Defense Health Agency. The Defense Health Agency (DHA) is a joint, integrated Combat Support Agency that enables the U.S Army, U.S Navy, and U.S Air Force medical services to provide a medically ready force and ready medical force to Combatant Commands in both peacetime and wartime.
Definition of preemption. 1a : the right of purchasing before others; especially : one given by the government to the actual settler upon a tract of public landb : the purchase of something under this right.
Why is it important to know that state laws in most instances preempt/overrule local laws? Preemption is a legal doctrine that means that a state law displaces or overrules a local (city or town) ordinance, law or regulation that is in the same subject area and is in conflict with the state law.