Purpose: This research aims to determine the application of the concept of obedience and application of the concept of the Rule of Law (Rechtstaat) and the concept of Trias Politica to the Constitutional Court Decision Number: 90/PUU-XXI/2023 concerning the age limit for presidential and vice-presidential candidates and how the implementation and principles of individual freedom in the rule of law are implemented in Indonesia. Method: The research was conducted using normative research methods (doctrinal research) using a conceptual approach. Results: The research results show that the Constitutional Court's decision requires an approach to the concept of the Rule of Law (Rechstaat) and the Trias Politica concept so that there is no deviation from power and is able to  face the dynamics of change that occur in society, as well as making laws that are more autonomous from intervention by other authorities such as political interests. So that the implementation of the concept of the rule of law in the context of a rule of law can be interpreted and obeyed by all citizens. Limitations: The main aim of applying the concept of the rule of law (Rechtstaat) and the concept of Trias politica is to limit the power of authority so as to produce a legal science teaching that is centered on rights.