Correct Option: C. Regional Legislatures Explanation of the Correct Answer Under the 1963 Constitution of Nigeria, the distribution of powers and responsibilities between the federal and regional governments was clearly defined. The constitution established three lists to categorize the subjects on which different levels of government could legislate: the Exclusive List, the Concurrent List, and the Residual List.

1. Exclusive List: This list contains subjects on which only the federal government can legislate. Examples include defense, foreign affairs, and immigration.
2. Concurrent List: This list includes subjects on which both the federal and regional governments can legislate. Examples include education, health, and agriculture.
3. Residual List: This is where the items not listed in either the Exclusive or Concurrent Lists fall. According to the 1963 Constitution, any matters not specified in these lists are considered to be within the exclusive competence of the regional legislatures. This means that the regional governments have the authority to make laws on these matters without interference from the federal government.

Why the Other Options Are Incorrect

• A. Executive: The executive branch, which includes the President and state governors, is responsible for implementing laws and policies but does not have legislative powers. The executive cannot create laws on matters not listed in the Exclusive or Concurrent Lists; that power lies with the legislatures.
• B. Federal Parliament: The federal parliament (comprising the Senate and House of Representatives) has the authority to legislate on matters in the Exclusive and Concurrent Lists. However, it does not have jurisdiction over matters that are not listed in these categories, as those are reserved for the regional legislatures.
• D. Judiciary: The judiciary interprets and applies the law but does not create laws. Its role is to ensure that laws passed by the legislature are in accordance with the constitution. The judiciary does not have the power to legislate on matters not included in the Exclusive or Concurrent Lists.

Summary of Key Points

• The 1963 Constitution of Nigeria established a federal system with a clear division of powers.
• Items not listed in the Exclusive and Concurrent Lists fall under the Residual List, which is the exclusive competence of regional legislatures.
• The executive branch implements laws, the federal parliament legislates on specified matters, and the judiciary interprets laws but does not create them.

Revision Summary

• The 1963 Constitution divides powers into Exclusive, Concurrent, and Residual Lists.
• Matters not listed in the Exclusive or Concurrent Lists are under the exclusive competence of regional legislatures.
• The executive, federal parliament, and judiciary do not have the authority to legislate on residual matters.
• Understanding the distribution of powers is crucial for grasping the functioning of Nigeria's federal system.