The acquired right is a fundamental institute of Constitutional and Administrative Law, which aims to ensure the stability of legal relations in the face of legislative changes. Its primary purpose is the protection of an individual's legal assets against the retroactivity of the law, ensuring that situations consolidated under the aegis of a previous norm remain intangible.
Concept and Foundation
The acquired right, in the classical doctrinal sense, is embodied in the power to demand the exercise of a benefit or a prerogative that has already been incorporated into the subject's legal assets, by virtue of an acquisitive fact completed under the rule of the law in force at the time of its occurrence. The legal nature of the institute is that of a fundamental guarantee, endowed with mandatory normative force, which acts as a material limit to the legislator's power of reform and to the application of the law over time.
The fundamental technical distinction lies in the triad composed of: acquired right (completed generating fact), expectation of right (mere possibility of future acquisition, without constitutional protection against normative change), and right in formation. The majority doctrine, led by authors such as Pontes de Miranda and Carlos Maximiliano, teaches that an acquired right requires that the holder has fulfilled all legal requirements provided for its enjoyment, making it immune to subsequent legislative modifications.
Historical Origin and Evolution
Historically, the institute emerges from the need for legal certainty in modern constitutionalism. In Comparative Law, the concept finds roots in the French doctrine of droit acquis and the German tradition of Vertrauensschutz (protection of trust). In Brazil, the protection of acquired rights has been enshrined since the 1934 Constitution, consolidating itself as an unamendable clause (cláusula pétrea) in the 1988 Constitution of the Federative Republic of Brazil (CRFB/88).
Legal and Constitutional Provision
The Brazilian legal system grants hierarchically superior protection to the institute:
- CRFB/88, art. 5, XXXVI: "The law shall not prejudice the acquired right, the perfect legal act, and the res judicata." This norm constitutes the unamendable core of the system, pursuant to art. 60, § 4, IV, of the same Charter.
- Law of Introduction to the Norms of Brazilian Law (LINDB), art. 6, § 2: Defines that "rights are considered acquired if their holder, or someone on their behalf, can exercise them, as well as those whose commencement of exercise has a pre-fixed term, or a pre-established unalterable condition, at their discretion."
Practical Application and Jurisprudence
The jurisprudence of the Superior Courts has refined the application of the institute, especially in matters of social security and the legal regime of public servants. The Supreme Federal Court (STF) has settled the understanding that there is no acquired right to a legal regime. This means that, although the public servant has the right to the maintenance of nominal remuneration (non-reducibility of wages), they do not have the right to demand that the calculation rules or the structure of their career remain immutable in the face of administrative reforms.
Within the scope of the STF, Theme 334 of General Repercussion reinforces the protection of acquired rights in retirement contexts, establishing that, once the requirements are met during the validity of a previous law, the insured maintains the right to the benefit, even if the application is subsequent. However, in cases of changes to social security rules (such as in Constitutional Amendment 103/2019), the court has validated "transition rules," which, although they mitigate expectations, do not violate acquired rights, provided that the age and contribution time requirements in force at the time of fulfilling the legal prerequisites are respected.
Related Principles and Divergences
The institute coexists with the principle of non-retroactivity of laws. Contemporary doctrinal divergence focuses on the tension between the acquired right and the theory of the consummated fact, the latter often rejected by the STF in environmental and public tender matters, under the argument that illegality does not generate rights, even if consolidated over time. Legal certainty, therefore, is not absolute and must be weighed against the principle of the supremacy of public interest.
Contemporary Relevance
In the current scenario, the discussion about acquired rights transcends the social security field, reaching Digital Law and long-term contractual relations. The stability of legal relations is the pillar that supports the citizen's trust in the State. The practical impact of the rigorous application of this principle is the limitation of legislative discretion, ensuring that the citizen is not surprised by normative changes that annul efforts and investments made based on previous norms.
Legal and Jurisprudential References
- BRAZIL. Constitution of the Federative Republic of Brazil of 1988. Brasília, DF.
- BRAZIL. Decree-Law No. 4,657, of September 4, 1942. Law of Introduction to the Norms of Brazilian Law.
- BRAZIL. Supreme Federal Court. Extraordinary Appeal 630.501 (Theme 334). Rapporteur: Justice Ellen Gracie.
- BRAZIL. Supreme Federal Court. ADI 2.417. Rapporteur: Justice Maurício Corrêa (On non-retroactivity and legal regime).
- MIRANDA, Pontes de. Treatise on Private Law. Volume I. Revista dos Tribunais.
