The Constitutional Court plays a central role within the federal Belgian state. This is a judicial court founded in 1980. Its jurisdiction was augmented in 1988 and 2003.

The Senate is one of the two chambers of the bicameral Federal Parliament of Belgium, the other being the Chamber of Representatives. It is considered to be the "upper house" of the Federal Parliament. Created in 1831 as a chamber fully equal to the Chamber of Representatives, it has undergone several reforms in the past, most notably in 1993 and 2014. The 2014 elections were the first without a direct election of senators. Instead, the new Senate is composed of members of community and regional parliaments and co-opted members. It is a chamber of the communities and regions and serves as a platform for discussion and reflection about matters between these federated entities. The Senate today plays a minor role in the federal legislative process. However, the Senate, together with the Chamber, has full competence for the Constitution and legislation on the organization and functioning of the Federal State and the federated entities. Since the reform of 2014, it holds about ten plenary sessions a year.