neutrality law.Int’l law. An act that prohibits a nation from militarily aiding either of two or more belligerent powers with which the nation is at peace; esp., a federal statute forbidding acts — such as the equipping of armed vessels or the enlisting of troops — designed to assist either of two belligerents that are at peace with the United States. 22 USCA §§ 441–457. [Cases: Neutrality Laws 1–5. C.J.S. Neutrality Laws §§ 2–7.]

[Blacks Law 8th]