The implementation of constitutional court decisions often experiences problems in their application. Where the constitutional court's decision, which is final and binding, does not yet have strong enough executory power in enforcing the decision. The problem that will be studied in this study is how the executory power of the Constitutional Court decision in testing the Law against the 1945 Constitution of the Republic of Indonesia. How are the legal implications of the executory power of the Constitutional Court's decision in the test of the Law against the 1945 Constitution of the Republic of Indonesia Based on the Theory of Legal Certainty. The research method uses a normative normative legal research type of juridical research, using t...