In accordance with the application principle, as reflected in Section 18 and Sections 19–19.3 of the Constitutional Court Law, proceedings before the Constitutional Court may be initiated only based on an application submitted by an applicant (Neimanis, 2019, The Law of Constitutional Court Procedure, p. 57). The Constitutional Court does not act ex officio; its jurisdiction is triggered exclusively by a properly formulated application.
Section 18(1)(4) of the Constitutional Court Law expressly requires that an application contain legal reasoning. Consequently, the obligation to provide legal reasoning rests primarily and initially with the applicant alone. Pursuant to Section 20(5)(3) of the Constitutional Court Law, failure to comply with this requirement constitutes grounds for a panel of the Constitutional Court to refuse to initiate proceedings.
Legal reasoning is an essential element of an application and must be sufficiently developed with regard to both the factual circumstances and the legal issues involved to enable the Constitutional Court to assess the claim on its merits. At a minimum, the reasoning must clearly disclose the factual basis of the application and its subject matter. Although the legal qualification (subsumption) advanced by the applicant is not decisive for the subsequent adjudication of the case, the alleged infringement of rights and the manifestation of the normative conflict must nevertheless be clearly identifiable from the reasoning.
Pursuant to point 58 of the Rules of Procedure of the Constitutional Court (Rules of Procedure of the Constitutional Court), when preparing an application for consideration, a panel or a judge may, where necessary, invite the applicant to provide additional explanations or submit documents, and may also request documents and information from the institution or official that adopted the contested act, as well as from any state or municipal institution, insofar as this is necessary to decide whether to initiate proceedings or to refuse to do so. However, this procedural power does not imply that the panel of the Constitutional Court is required to identify or substitute missing legal reasoning in the application or to remedy deficiencies in the applicant's argumentation. Additional explanations or information may be sought only to clarify a specific factual circumstance or an unclear argument; otherwise, it could be assumed that the Court itself has effectively lodged the application, which is impermissible.
Sections 19–19.3 of the Constitutional Court Law, depending on the category of applicant, lay down additional requirements concerning the reasoning of the application, which must be complied with in addition to the general requirements.
The absence of adequate legal reasoning in an application is one of the most frequently cited grounds in decisions of panels of the Constitutional Court refusing to initiate proceedings. (Constitutional Court of the Republic of Latvia, 2024, Review of the Work of the Constitutional Court, pp. 65, 68; Constitutional Court of the Republic of Latvia, 2023, Review of the Work of the Constitutional Court, pp. 63–64; Constitutional Court of the Republic of Latvia, 2022, Review of the Work of the Constitutional Court, pp. 62, 66). For this reason, proceedings have been refused not only in respect of constitutional complaints submitted by private individuals within the framework of concrete norm control, but also in respect of applications submitted by municipalities and by courts, and even – remarkably – in 2018 in respect of an application submitted by the Prosecutor General under abstract norm control (Decision of a Panel of the Constitutional Court of 5 June 2018).
This practice highlights the need for a more detailed examination of the content of the requirement to provide legal reasoning in applications, as well as an analysis of the most common errors.
This article aims to identify the content and function of the requirement of sufficient legal reasoning in Constitutional Court proceedings, to analyse the most common deficiencies in applications revealed in panel practice, and to formulate proposals for improving the quality and effectiveness of constitutional review in practice.
However, given the breadth of the topic, the present article focuses exclusively on applications for norm control, as these are submitted most frequently. Nevertheless, the conclusions drawn may also be applied when assessing the reasoning of applications in disputes involving constitutional state authorities or their constituent parts.
The article is based on doctrinal legal research. It uses analytical and systematic interpretation of the Constitutional Court Law and the Rules of Procedure of the Constitutional Court, as well as qualitative analysis of the case law of the Constitutional Court, in particular decisions of its panels on the initiation of proceedings. The study also relies on relevant legal scholarship and comparative doctrinal insights from German constitutional procedural law. By combining normative analysis with case-law analysis, the article reconstructs the main elements of legally sufficient reasoning and identifies recurrent deficiencies in applications.
The relatively limited Latvian bibliography devoted specifically to the criterion of sufficient legal reasoning in Constitutional Court procedure suggests that this issue has so far been addressed more often in practice than as an autonomous object of doctrinal analysis. For that reason, the article supplements the available Latvian literature with comparative doctrinal sources, particularly from German-language scholarship on constitutional procedural law and legal methodology. This comparative reliance does not imply a direct transplantation of foreign solutions, but serves as an auxiliary analytical framework for systematising questions that remain only partially elaborated in Latvian legal scholarship.
The reasoning of an application consists of the legal arguments that link the presentation of the factual circumstances of the case with the claim submitted to the court. Since an applicant may request the Constitutional Court to declare a legal norm or an act (or omission) of a public authority incompatible with a legal norm of higher legal force, the reasoning of an application in norm control proceedings comprises legal arguments concerning the content of the contested legal norm, the content of the higher-ranking legal norm and the incompatibility between the two.
The panels of the Constitutional Court have likewise clarified that, within the meaning of the Constitutional Court Law, the legal reasoning of an application refers to legal argumentation substantiating the incompatibility of the contested norm with the higher-ranking legal norm indicated in the application (Decision of a Panel of the Constitutional Court of 8 January 2026).
The legal arguments contained in the reasoning of an application are derived through a defined methodological process, namely by applying legal methods. These include methods of interpretation of legal norms, methods of legal development, as well as various forms of argumentative inference.
For example, the historical method of interpretation yields arguments concerning the content of a legal norm by examining the circumstances that necessitated its adoption, the debates surrounding its content during the drafting process, the considerations expressed during the legislative deliberations, and the subsequent amendments and evolution of the norm after it enters into force (Neimanis, 2004, Introduction to Law, p. 154). The systematic method of interpretation provides arguments regarding the content of a legal norm derived from its position within the legal system, encompassing both externally observable elements (such as the placement of a provision within a legislative act) and internal, less visible elements (such as its systematic connection with other norms within the same legal institution or branch of law) (Zippelius, 2003, 53–pp.52).
The requirement to provide reasoning is not an end in itself. Rather, it serves to discipline the applicant by compelling a thorough engagement with the content of the legal norms at issue – both the lower-ranking norm and the higher-ranking norm – and to test the applicant's initial assumption that these norms are incompatible within the legal system and that such incompatibility requires resolution in the factual circumstances of the case. The obligation to present the reasoning in written form both reinforces and complicates this requirement. Experience shows how difficult it is to translate abstract or intuitive ideas into precise written argumentation, how much time may be devoted to a single paragraph, and how demanding it is to structure and refine legal arguments. This process may ultimately reveal that an initial position was premature, subjective, or insufficiently substantiated.
At the same time, the reasoning requirement serves the optimal use of a limited public resource – the judiciary. Public resources are inherently finite, and society cannot afford to finance judicial activity without constraints. Consequently, various procedural thresholds are established to distinguish a genuine need for legal protection from frivolous or purely speculative applications. One such threshold is the obligation to substantiate the need for a specific legal remedy, namely a judgement of the Constitutional Court capable of resolving the problem identified in the application and remedying the alleged infringement of rights.
Furthermore, the requirement of legal reasoning promotes procedural efficiency. By examining the reasoning provided, the court can assess the impact of the contested norm or act on the applicant's factual situation, the seriousness of the application and the necessity of deploying public judicial resources to restore coherence within the legal system and ensure effective protection of rights.
In informal discussions among lawyers, it is sometimes suggested that the reasoning of an application should be so comprehensive that the court would effectively have a draft judgement at its disposal. This perception may be reinforced by the standardised wording used in decisions of the panels of the Constitutional Court, according to which legal reasoning consists of the set of legal arguments that is both necessary and sufficient for granting the claim (Decision of a Panel of the Constitutional Court of 25 September 2024).
However, such an understanding cannot be fully endorsed. At the stage of deciding whether to initiate proceedings, the panel of the Constitutional Court examines only the admissibility of the application and cannot simultaneously determine whether the claim is substantively well founded. The court must conduct its own objective examination of the case, hear the parties, and only thereafter is it entitled to adjudicate the merits. The law does not require the applicant to assume the role of the court or to relieve the court of its duty to carry out further examination; such an expectation would amount to an excessive extension of the application principle.
It is therefore essential to strike a balanced approach between the requirement of sufficiently substantiated legal reasoning, the efficiency of judicial proceedings and the applicant's legal capacity to make effective use of available remedies for the protection of rights.
Sufficient legal reasoning in constitutional review is not satisfied by the mere expression of dissatisfaction with a legal norm, nor by isolated references to constitutional provisions or judicial decisions. It requires a structured line of legal argument through which the applicant demonstrates the existence of a genuine normative conflict. That line of argument must proceed step by step: first, by determining the content of the contested legal norm as it operates within the legal system; second, by clarifying the meaning and scope of the higher-ranking legal norm invoked as the standard of review; and third, by undertaking a reasoned comparison capable of showing why the two norms are incompatible. Only such a methodologically coherent sequence makes it possible to distinguish a constitutionally relevant legal claim from a merely abstract or speculative objection.
Identifying the content of a legal norm entails defining the characteristics inherent in that norm. These characteristics are determined through the application of methods of legal interpretation. By employing such methods, arguments are derived from the wording of the norm, its historical origin and subsequent development, its systematic relationship with other legal norms and its underlying purpose. Additional arguments may be drawn from judicial decisions and scholarly doctrine.
Where the interpretation concerns norms of international law, further arguments regarding their content may also be obtained from the explanations, interpretations and opinions of the institutions established under the relevant international treaties. These sources may be particularly significant in clarifying the scope and meaning of international obligations and in ensuring their coherent integration into the domestic legal order.
The applicant is required to disclose the content of the lower-ranking legal norm. This raises the question whether such disclosure must be undertaken independently by the applicant, or whether it is sufficient to rely on the interpretation already provided by a court of general jurisdiction or an administrative court. In practice, applicants are often dissatisfied with the manner in which a court or administrative authority has concretised the content of the norm in the course of judicial or administrative review and therefore advance an alternative understanding.
However, since the Constitutional Court does not reassess issues of interpretation and application of legal norms, nor does it review the lawfulness of decisions of courts of general jurisdiction or administrative courts (Decision of the Constitutional Court of 17 November 2017on the termination of proceedings), even a potentially erroneous application of a legal norm does not, as such, constitute grounds for reviewing the constitutionality of that norm (Judgment of the Constitutional Court of 30 March 2022).
At the same time, the Constitutional Court has sent rather ambivalent signals as to whether the content of a legal norm, as defined in judicial practice, becomes its objective content. In several cases, the Court has stated that ‘a legal norm cannot be understood outside its application practice' (e.g. , Judgment of the Constitutional Court of 15 March 2018). Subsequently, however, the Court's approach has not been uniform. In some cases, the Constitutional Court has attributed to a lower-ranking legal norm the content previously defined by a court of general jurisdiction and, on that basis, found it incompatible with a higher-ranking legal norm (Judgment of the Constitutional Court of 2 November 2020). In other cases, the Constitutional Court has declined to adopt the interpretation given by a court of general jurisdiction, thereby concluding that no incompatibility with a higher-ranking legal norm arises (e.g., Decision of the Constitutional Court of 30 December 2020 on the termination of proceedings).
Therefore, the case law reveals a certain tension in determining how the content of the contested lower-ranking norm is to be established. On the one hand, the applicant cannot ignore settled judicial interpretation, since the existence of a genuine normative conflict must be assessed in light of the norm as it actually operates within the legal system. On the other hand, constitutional review cannot be made wholly dependent on ordinary judicial interpretation, particularly where that interpretation itself may be constitutionally problematic or insufficiently settled. This tension is significant for the sufficiency requirement: the applicant must engage seriously with the existing interpretative practice, but the admissibility criterion should not be applied as though the meaning of the contested norm were always fixed conclusively in advance.
In spite of fluctuations in judicial approach, the applicant must independently disclose the content of the lower-ranking legal norm. Only by doing so is it possible to compare that norm with higher-ranking legal norms and to assess whether they are mutually compatible.
Although all arguments derived from methods of legal interpretation may be relied upon, particular importance in assessing compatibility with higher-ranking legal norms attaches to arguments drawn from the legal system as such – both its internal and external structure. Legal norms do not exist in isolation, and no individual norm may be interpreted independently of other norms within the legal order.
Since legal norms are arranged not only horizontally but also vertically, and since the content of lower-ranking legal norms is derived from or concretised by higher-ranking legal norms, the interpretation of a lower-ranking norm must take into account the content of higher-ranking legal norms. The reverse, however, is not permissible. The content of a higher-ranking legal norm – particularly a constitutional provision – cannot be justified or determined by reference to the content of a lower-ranking legal norm. This follows from the principle that the author of a lower-ranking norm is bound to comply with higher-ranking legal norms, and not vice versa.
By examining the vertically structured relationship between norms, the applicant must ascertain that the factual situation is directly affected by the lower-ranking legal norm (Decision of the Constitutional Court of 28 October 2021 on the termination of proceedings). In some cases, however, the factual situation may be governed primarily by a higher-ranking legal norm based on which a more specific lower-ranking norm has been adopted. In such circumstances, all relevant norms must be included in the legal reasoning.
When interpreting a lower-ranking legal norm, it must be interpreted, insofar as possible, in conformity with higher-ranking legal norms:
- (a)
the Constitution (constitution-conforming interpretation);
- (b)
European Union law (EU-law-conforming interpretation);
- (c)
Principles of international law (international-law-conforming interpretation).
Conforming interpretation presupposes the following conditions:
- (1)
The legal norm allows for at least two plausible interpretations;
- (2)
at least one of these interpretations is incompatible with a higher-ranking legal norm;
- (3)
at least one interpretation is compatible with the higher-ranking legal norm.
Where it is possible to interpret a legal norm in conformity with a higher-ranking legal norm in such a way that the values enshrined in the higher-ranking norm can be realised through that interpretation, that interpretation must be preferred (Walbert et al., 2003, p. 73). In this manner, the higher-ranking legal norm – such as the Constitution – serves both as an instrument for controlling the content of the lower-ranking norm and as an instrument for transforming that content, since reinterpretation may bring the norm into conformity with constitutional requirements.
Conforming interpretation, however, is not without limits. Its boundaries are set by the wording of the interpreted norm and by the clearly ascertainable intent of the legislator. Through interpretation, a legal norm must not be assigned a meaning that is entirely different from its textual meaning or legislative intent, nor may it be deprived of an essential element deliberately established by the legislature (Judgment of the Administrative Law Department of the Supreme Court of 31 October 2018).
In addition to the obligation to comprehensively describe the content of the contested lower-ranking legal norm, the applicant is also required to engage in a substantive analysis of the subject matter of the application and to link it to the alleged conflict with, and infringement of, a higher-ranking legal norm. The applicant must clearly demonstrate that it is precisely the contested lower-ranking legal norm that has led to a disregard of, or violation of, the hierarchy of legal norms and of the higher-ranking legal norm itself (Benda et al., 2020 p. 290).
Accordingly, the reasoning must disclose the content of the higher-ranking legal norm. Where that norm is a provision of the Constitution, it must be examined whether its interpretation has already been provided by the Constitutional Court. Scholarly articles and constitutional commentaries likewise constitute valuable sources for defining the content of constitutional provisions. In determining the scope of fundamental rights, account may also be taken of the principles developed in the case law of the European Court of Human Rights.
Where an application challenges a lower-ranking legal norm that implements European Union law or operates alongside EU law (including the Treaties and regulations), the reasoning substantiating the alleged incompatibility must take due account of EU law, including EU fundamental rights. In such cases, the applicant must provide reasons why the national regulatory framework fails to ensure a sufficient level of protection of rights and why EU law should be applied or taken into consideration. This requires reliance on the case law of the Court of Justice of the European Union or on the practice of the relevant EU institutions. The applicant bears the burden of presenting specific and sufficient arguments in support of this position, which in practice entails comparing the standards of protection applicable at the national and EU levels in the particular case. Such a comparison constitutes a particularly demanding task, especially in light of the short time limits for submitting an application in constitutional complaint proceedings.
The judgements of the Constitutional Court further contain well-developed substantive criteria for reviewing the proportionality of restrictions on rights (Judgment of the Constitutional Court of 11 December 2020), for assessing compliance with the principle of equality (Judgment of the Constitutional Court of 20 November 2024) and the prohibition of discrimination (Judgment of the Constitutional Court of 23 April 2019), as well as for applying the test of the State's positive obligations (Judgment of the Constitutional Court of 25 June 2020), among others. Where an applicant requests an assessment of a contested norm's compatibility with Article 89 of the Constitution, the Constitutional Court has clarified that the application must substantiate which additional rights or obligations – beyond those already encompassed by the constitutional catalogue of fundamental rights – arise from Article 89 in relation to the specific situation (Decision of a Panel of the Constitutional Court of 4 July 2025). Similarly, where an application seeks review of a contested norm's compatibility with the European Convention on Human Rights, the applicant must also explain why compliance with the international norm requires separate examination from compliance with the corresponding constitutional provision (Decision of a Panel of the Constitutional Court of 14 October 2025).
Where an applicant alleges that a lower-ranking legal norm is incompatible with a higher-ranking legal norm, the panels of the Constitutional Court expect that this incompatibility will be disclosed following the argumentative sequence customarily employed in the Court's own judgements. While this requirement may appear demanding, it serves a clear purpose: to compel the author of the reasoning to confront each element of the higher-ranking legal norm, many of which are highly abstract and often not explicitly articulated in the text of the norm itself. If these elements are not identified at the outset, the assessment of compatibility between the norms will inevitably be incomplete or even erroneous.
By way of example, in order to claim that a lower-ranking legal norm is disproportionate, the applicant must first examine and articulate the legitimate aim pursued by the norm. Only thereafter can the applicant meaningfully proceed to weigh the competing interests involved and provide a substantiated assessment of proportionality.
Only after the content of the legal norms involved in an initially merely apparent conflict has been defined is it possible to assess whether a genuine, mutually exclusive normative conflict exists that requires the intervention of the Constitutional Court. Such a conflict arises where at least two legal norms of different hierarchical rank are applicable to the same factual situation and lead to divergent legal consequences. In essence, the application of one legal norm logically excludes the application of the other.
Accordingly, in order to conclude that several norms are in a mutually exclusive conflict, those norms must be applied to the factual situation at issue, and it must be demonstrated that they produce incompatible legal effects. At this stage, it is also necessary to argue that the conflict is not merely apparent – that is, that it cannot be resolved by other legal methods or techniques.
As is evident, the most substantial effort must be devoted to disclosing the content of the legal norms that form the basis of the comparison. Only then can the comparison be accurate and methodologically sound. Particular care is also required where several closely interrelated lower-ranking legal norms are challenged, or where one lower-ranking norm is assessed against multiple higher-ranking legal norms. Where an application challenges more than one legal norm, each norm must be precisely identified (by indicating the specific article, paragraph, or subparagraph), and the incompatibility of each norm with the higher-ranking legal norm(s) must be substantiated separately (Walbert et al., 2015, p. 240). A generalising approach of this kind has likewise been rejected in the practice of the panels of the Constitutional Court (Decision of a Panel of the Constitutional Court of 6 January 2026).
General references to a possible violation of constitutional provisions are insufficient. The application must explain why and in what manner the lower-ranking legal norm is incompatible with the Constitution. Similarly, the following cannot be regarded as adequate substantiation of incompatibility with a higher-ranking legal norm: general assertions regarding the perceived injustice of the situation created by the contested norm and the need for new regulation (Decision of a Panel of the Constitutional Court of 22 July 2025); a description of the factual circumstances of a specific civil case combined with a general claim that the outcome of the proceedings was unjust (Decision of a Panel of the Constitutional Court of 1 July 2020); or the mere citation of legal provisions, scholarly opinions, or Constitutional Court case law, accompanied by the applicant's view as to how a public official or a judge of a court of general jurisdiction should have interpreted and applied the contested norm in the applicant's case (Decision of a Panel of the Constitutional Court of 1 October 2020).
Finally, the mere attachment of documents to the application does not in itself relieve the applicant of the obligation to provide a logically coherent, comprehensible and autonomous legal reasoning. A simple and general reference to documents appended to the application is insufficient. The Constitutional Court is not required to extract, on its own initiative, the legally relevant arguments for the purposes of assessing the legal reasoning from an undifferentiated set of annexes.
In an application, it is not sufficient to substantiate solely the existence of an exclusive conflict between a lower-ranking legal norm and a higher-ranking legal norm. In certain types of applications, it is additionally necessary to substantiate which fundamental rights or other rights enshrined in the Constitution are allegedly infringed, how that infringement manifests itself, that no other effective legal remedies are available to eliminate the infringement, and that the statutory time limit for submitting the application has been observed.
For this purpose, the applicant must also substantiate the existence of the admissibility requirements of the application (Hillgruber and Goos 2015 p. 49). This includes, in particular, demonstrating the applicant's standing, the direct and individual nature of the alleged infringement, the exhaustion of available remedies where required and compliance with procedural time limits. The reasoning must make it possible for the Constitutional Court, at the admissibility stage, to assess whether the application satisfies the procedural thresholds for initiating constitutional review, without the need for the Court to reconstruct these elements on its own initiative.
A constitutional complaint, in the strict sense, may be submitted only by a private individual and only in cases involving an alleged infringement of that individual's fundamental rights. Accordingly, the applicant must substantiate, in legal terms, that he or she falls within the scope of protection of the specific fundamental right invoked and thus belongs to the category of right-holders protected by that right.
By contrast, local authorities do not act as holders of fundamental rights in the same way as private individuals. Although a municipality may submit an application to the Constitutional Court within the scope of constitutional review provided by law, it cannot successfully rely on constitutional provisions whose personal scope of protection is limited to private persons. For this reason, panels of the Constitutional Court have refused to initiate proceedings where municipal applicants attempted to invoke fundamental-rights norms that do not protect public legal persons or their institutions. For example, panels of the Constitutional Court have refused to initiate proceedings where a municipal council argued that the contested norms were incompatible with fundamental rights provisions such as the first sentence of Article 91 of the Constitution (Decision of a Panel of the Constitutional Court of 2 September 2020) or the first or second sentence of Article 112, holding that these constitutional provisions protect only the rights of private individuals and not those of public legal persons or their institutions (Decision of a Panel of the Constitutional Court of 12 September 2016).
Even where an application is submitted within the framework of abstract norm control but challenges the compatibility of a norm with a fundamental rights provision, the applicant must substantiate that the contested norm restricts the rights of a particular group of persons and that there exists a causal link between the contested norm and the negative consequences experienced by those persons (Judgment of the Constitutional Court of 30 March 2011). Consequently, the applicant must explain whether, why and how, in the specific factual circumstances, the relevant group of persons falls within both the scope of the fundamental right and the scope of application of the contested norm.
Where an individual has already made use of the legal remedies available to him or her – such as filing an action, an appeal, or a cassation complaint before a court of general jurisdiction or an administrative court – the applicant must substantiate that the alleged normative conflict was decisive for the unsuccessful outcome of the prior legal protection. This entails demonstrating whether the reasoning of the judicial decision was based precisely on that consideration or on several independent grounds. Where the decision rests on multiple independent grounds, it is insufficient to subject only one of them to constitutional review if a finding of unconstitutionality in respect of that ground would not alter the outcome of the decision because it is sustained by other constitutionally permissible grounds.
In interpreting the first paragraph of Section 19.2 of the Constitutional Court Law, the Constitutional Court has held that the applicant lodging a constitutional complaint must substantiate that it is precisely the contested legal norm that infringes his or her constitutionally guaranteed fundamental rights (Decision of a Panel of the Constitutional Court of 12 January 2026; Decision of the Constitutional Court of 23 November 2016; Judgment of the Constitutional Court of 10 May 2013 terminating proceedings). A contested legal norm interferes with the content of an individual's rights and obligations protected by fundamental rights where there exists a direct link between the restriction of those fundamental rights and the contested legal norm. The reasoning must therefore establish the existence of such a link.
The possibility of an infringement of fundamental rights is characterised by three elements derived from the first paragraph of Section 19.2 of the Constitutional Court Law:
- (1)
a personal infringement;
- (2)
an actual infringement;
- (3)
a direct infringement.
These elements serve to distinguish a constitutional complaint from an actio popularis and to determine whether an individual has a legally recognisable interest in protection and whether that interest may be pursued specifically through a constitutional complaint. Accordingly, the presentation of the factual circumstances in the application must at least set out facts enabling the panel to verify the existence of these elements; where necessary, the applicant must further substantiate this position through legal argumentation and not merely by factual assertions. The same applies to demonstrating whether general legal remedies have been exhausted, particularly where the applicant relies on the absence or ineffectiveness of such remedies.
In substantiating compliance with the principle of subsidiarity of legal protection, the applicant is required to indicate that all available general legal remedies have been exhausted. First, the applicant must explain that the available avenues of legal protection have been pursued. Second, where legal protection cannot be achieved through the remedies available to the individual, the applicant must substantiate why this is the case and how the absence or ineffectiveness of such remedies manifests itself. Neither the law nor, consequently, the practice of the panels of the Constitutional Court requires the applicant to demonstrate that higher-ranking legal norms and their conflict with the contested norm were already invoked before a court of general jurisdiction or an administrative court.
A municipality may submit an application only in cases involving an infringement of its own rights. Accordingly, the application must additionally substantiate the specific rights of the municipality that are allegedly infringed. This requires demonstrating that a higher-ranking legal norm confers certain rights upon the municipality and that the contested norm interferes with those rights, that is, produces adverse consequences for the municipality.
For example, the Riga District Council submitted an application arguing that the contested norms interfered with its competence to organise public transport. The Constitutional Court held, however, that the contested norms regulated the organisation of public transport on routes extending beyond the territory of a single municipality and therefore did not affect the municipality's rights (its autonomous competence) (Decision of the Constitutional Court of 16 April 2008 terminating the proceedings).
A municipality may challenge only an infringement of its own rights, not those of another municipality. Reasoning based on an alleged infringement of the rights of another municipality is insufficient and inadmissible (Decision of a Panel of the Constitutional Court of 22 December 2015).
Judges are subject only to the law and to legal principles. They are not bound by legal norms that are invalid because they are incompatible with higher-ranking legal norms. However, a judge may be released from the obligation to apply an invalid legal norm only in the manner prescribed by law, namely by submitting the question of the norm's compatibility with a higher-ranking legal norm to the Constitutional Court.
A court may submit an application only in the context of a specific case pending before it and within the scope and factual circumstances of that case. The alleged normative conflict raised in the application must not be hypothetical. For this reason, in addition to the general requirements concerning the scope of reasoning, the court must also set out arguments explaining why the legal norm it intends to challenge before the Constitutional Court is necessary for the resolution of the case, why precisely that norm determines the substantive outcome of the case, or how it affects the course of the proceedings (Decision of a Panel of the Constitutional Court of 3 February 2025; Schlaich and Korioth 2015 p. 120).
In one case, a court challenged the constitutionality of a norm applicable to household users, even though the case before it concerned a civil action for the recovery of a debt for supplied natural gas against a company as a user and against a member of its management board. The panel held that the application failed to substantiate why the contested norms were applicable in the case pending before the applicant court (Decision of a Panel of the Constitutional Court of 8 July 2021).
The court is the primary applier of the law and has at its disposal a broad range of legal methods to achieve a just outcome within the legal system (Decision of a Panel of the Constitutional Court of 4 July 2025). Consequently, a court submitting an application must additionally substantiate that the contested norm cannot be interpreted in an alternative manner and that its content cannot be specified to avoid a conflict with a higher-ranking legal norm. It must also demonstrate that there are no possibilities to employ methods of legal development to eliminate the conflict—for example, by narrowing the scope of the contested norm to ensure conformity with higher-ranking law, or by filling a legislative gap through analogy.
In one case, the applicant court considered that a norm prohibiting the construction of new buildings and structures, as well as the expansion of existing ones, in a coastal dune protection zone restricted an individual's property rights by preventing the reconstruction of buildings that had been destroyed by fire. The Constitutional Court concluded that such a prohibition did not follow from the norm if it was interpreted comprehensively and in conformity with higher-ranking law (Decision of the Constitutional Court of 2 March 2015 terminating the proceedings).
This article demonstrates that legal reasoning in applications submitted to the Constitutional Court is not merely a formal procedural requirement, but a central structural element of constitutional adjudication. The sufficiency of legal reasoning determines both the admissibility of an application and the Constitutional Court's ability to fulfil its function as a guardian of constitutional supremacy and effective legal protection.
The analysis confirms that legal reasoning consists of a coherent set of legal arguments concerning the content of legal norms. These arguments disclose the relationship between lower-ranking and higher-ranking legal norms and connect the factual circumstances of the case with the claim for constitutional review. The development of such arguments necessarily follows a methodological process based on recognised methods of legal interpretation and legal reasoning.
The obligation to provide sufficient legal reasoning applies to all categories of applicants. It functions simultaneously as an instrument of self-assessment for the applicant and as a mechanism ensuring the procedural efficiency of the Constitutional Court. Excessive formalism in assessing legal reasoning may unjustifiably restrict access to constitutional justice, whereas insufficiently developed reasoning undermines the effectiveness of constitutional review. Striking an appropriate balance between these two considerations constitutes the core of the criterion of sufficiency of legal reasoning.
The article establishes that legal reasoning must be constructed in a clear, staged sequence: first, the content of the contested legal norm must be defined; second, the content of the higher-ranking legal norm must be disclosed; and third, a comparative assessment must be undertaken to determine whether a genuine normative conflict exists. Only such a structured approach enables a precise and methodologically sound evaluation of compatibility between legal norms.
In defining the content of a lower-ranking legal norm, interpretation should, insofar as possible, ensure conformity with higher-ranking legal norms. Conversely, the content of higher-ranking legal norms – particularly constitutional provisions – must be determined independently, relying primarily on the jurisprudence of the Constitutional Court and relevant doctrinal sources. This reflects the hierarchical structure of the legal system and the binding force of higher-ranking norms.
In applications submitted in the form of constitutional complaints, municipal applications, or applications by courts, the applicant must additionally substantiate the admissibility requirements specific to each category. In practice, applicants frequently fail to demonstrate a direct and present infringement of fundamental rights that cannot be remedied through available legal remedies. Courts, in turn, often omit to substantiate the decisive relevance of the contested norm for the resolution of the pending case or to explain why the alleged normative conflict cannot be eliminated through interpretation or legal development.
Overall, the study confirms that the criterion of sufficiency of legal reasoning serves as a substantive instrument for enhancing the quality, credibility and effectiveness of constitutional adjudication. A clearer doctrinal understanding of the criterion of sufficient legal reasoning cannot, in itself, eliminate the high number of inadmissible applications. In some cases, the applicant may simply be unable to demonstrate a genuine normative conflict or a constitutionally cognisable infringement. Nevertheless, greater methodological clarity may improve the quality of applications in those cases where a legally relevant constitutional issue exists but is presented in a fragmented, incomplete, or methodologically imprecise manner. In this sense, clarification of the criterion should not be understood as a means of lowering the admissibility threshold, but rather as a means of making that threshold more transparent, predictable and consistently applicable in practice.
In light of the findings of this study, several proposals may be advanced for improving legal practice. First, the Constitutional Court could develop publicly accessible methodological guidelines or amend model structures for applications, setting out the sequential elements of sufficient legal reasoning. Second, panel decisions refusing to initiate proceedings could, where appropriate, identify more precisely, which component of the reasoning is lacking, thereby contributing to greater legal certainty and better future applications. Third, targeted training for judges, advocates, lawyers and other applicants could strengthen the methodological quality of constitutional argumentation. Such measures would not lower the threshold for admissibility, but would make it more transparent, predictable and practically accessible.