Which of the following is NOT a source of military law?

The correct answer, identifying a source that is NOT a source of military law, is based on the understanding that each of the options serves a distinct role in the framework of military law.

While federal statutes, including those specifically governing military operations and activities, do play a significant role in shaping military law, they differ from the other sources in their direct applicability and scope. The U.S. Constitution establishes the foundation for military law by giving Congress the authority to organize, arm, and discipline the military. The Uniform Code of Military Justice (UCMJ) is a primary source of military law, outlining the legal framework for military personnel. International law also influences military law, particularly regarding adherence to treaties and global conduct standards.

In contrast, federal statutes, while they may relate to military matters, are distinct from the broader legal frameworks established by the Constitution, UCMJ, and international law. Therefore, they do not serve as a foundational source of military law, making them the correct answer to the question regarding what is NOT a source of military law.