What are the sources of the Nigeria 1999 constitution?

The 1999 Constitution of Nigeria is derived from various sources, including colonial laws, especially the 1960 and 1979 Constitutions, which laid the groundwork for Nigeria's legal framework. It also incorporates elements from customary law and judicial precedents. Additionally, the constitution reflects the influence of international human rights instruments and the need for a democratic governance structure following years of military rule. Overall, it aims to establish a federal system that recognizes the diversity of Nigeria's ethnic and cultural groups.