Military affairs: other; release of the Michigan National Guard into active duty combat without an official act of Congress; add related definitions. Amends 1967 PA 150 (MCL 32.501 - 32.851) by adding sec. 203a.

HB 4164 adds new definitions to Michigan's military law to clarify when the Michigan National Guard can be deployed into active combat. It defines "active duty combat" as participating in armed conflict, hazardous service related to conflict abroad, or war-related duties, and specifies that an "official declaration of war" requires a formal act by the U.S. Congress under the Constitution. This bill directly affects Michigan National Guard deployments by requiring state officials to confirm Congress has declared war before sending troops into combat roles. The definitions would guide state officials in determining whether a deployment complies with the law, preventing unilateral state decisions for combat missions.