Sincere cooperation

In Article 10 of the Treaty establishing the European Community (TEC) from 2002, the provision contains the outlines of what is today known as "the principle of sincere cooperation": However, since the Treaty of Lisbon the provisions have been enhanced through Articles 4(3) and Article 24(3) of TEU: Initially, it is notable that sincere cooperation gained a more significant prominence in the founding treaties and a more central position, that follows immediately after the Union's values. This balance can be witnessed in Article 13 TEU: This balance with sincere cooperation between inter-parties relationship, regarding the Member States and the Union, has been extended to intra-institutional relationships, within the EU. The constitutional origin of this intra-institutional commitment to sincere cooperation could be traced in CJEU case law, such as the case Greece v Council from 1986 and Luxembourg v Parliament from 1981, where the Court established that "the operation of the budgetary procedure..., is based essentially on inter-institutional dialogue. That dialogue is subject to the same mutual duties of sincere cooperation which, as the Court has held, govern relations between the Member States and the Community institutions...". The latter are duties applicable to the Union's Common Foreign and Security Policy. For instance, Article 24 TEU, underlines: This specific CFSP obligation is to a certain extent related to the principle of sincere cooperation but has its own space in the Treaty as these two principles could be perceived as distinct: the principle of close cooperation under CFSP is applicable "once a decision for mixed external action has been made", as opposed to the principle of sincere cooperation that in other competences applies before, while the decision has been made, and after it comes into force. == Constitutional identities and sincere cooperation ==

A legal limit to sincere cooperation has been imposed within the same Article 4: Right before the principle of sincere cooperation is introduced, the legislator notes the importance of national identities. Simultaneously, this does not infer that national identity enjoys supreme power within the Union's system, yet it is balanced against the "uniform application of EU law" through a composite constitutional structure of the CJEU and the national courts and institutions. Precisely for this to function in practice, the principle of sincere cooperation is invoked again as it its importance is crucial for the coordination of this multi-dimensional jurisprudence. Limits regarding Common Foreign and Security Policy Consequently, this once again, emphasizes the interconnection between national identities, sincere cooperation, and the Union's foreign policy. To this end, the Member States concerned for their rights to sovereignty within this multi-dimensional jurisprudence that requires sincere cooperation on an international level, have emphasized the non-exclusionary rights through Declarations 13 and 14 of the Lisbon Treaty: the mutual political solidarity and sincere cooperation on the CFSP EU level, "do not affect the responsibilities of the Member States... for the formulation and conduct of their [national] foreign policy...". == Case law ==

ECHR and sincere cooperation The EU legal order and the ECHR legal system are two separate ones, and while the EU is not a member of the Council of Europe, the Member States of the Union are; consequently, the principle of sincere cooperation has appeared in cases before the European Court of Human Rights. Hungary The case Könyv-Tár Kft and Others v. Hungary (Application No. 21623/13) concerned three applicant companies, all schoolbook distributors, which claimed that the creation of a state monopoly on school books is a breach of Article 1 of the Protocol No.1, namely the peaceful enjoyment of possessions. In the ECtHR deliberations, the Court has made the following arguments regarding the principle of sincere cooperation as part of the European Union legislation: Here, the ECtHR notes the importance of sincere cooperation on a judicial level between the Court of Justice of the European Union and the national courts, while also stipulating that the Union's authorities have a responsibility to observe the practice of sincere cooperation within their conferred competence. Consequently, Member States' interactions with the Union is continuously guided by the aforementioned principle. This has been reflected in CJEU case law in different areas of competence across the EU. United Kingdom In Case C-516/22 Commission v United Kingdom of Great Britain and Northern Ireland decided on 14 March 2024, the Court assessed the judgment of the Supreme Court of the United Kingdom in the case Micula v Romania. The Supreme Court of the United Kingdom in the aforementioned case ordered Romania to pay a compensation to Swedish investors, despite the Commission prohibiting Romania to do so, as it was incompatible with EU law. As a result of the decision of the Supreme Court of the United Kingdom, the CJEU declared that "the United Kingdom has failed to fulfil its obligations under EU law": Consequently, the Court has elaborated on the role of Member States in the process of transposition of a Directive, according to the principle of sincere cooperation: Slovenia In the case (C‑316/19), Commission (supported by the European Central Bank) v Slovenia, the Commission brought the Republic of Slovenia before the Court because it alleged that it breached the Union's law and failed to cooperate sincerely "by unilaterally seizing at the premises of the Banka Slovenije (Central Bank of Slovenia) documents connected to the performance of the tasks of the European System of Central Banks (ESCB) and of the Eurosystem". The Court, in its findings, focuses on the reciprocity of the relationship between the Union's institutions and the Member States: Therefore, the Court establishes that even in a situation where there is a breach of Union's law on the side of the Member State, thus failing to adhere to the principle of sincere cooperation—reciprocity remains a core component of this principle, and a way to continue to uphold it is by providing assistance from the Union's institutions. ==References==