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.
Madam Justice Nancy Saitta of the Supreme Court of Nevada offered a complete description in Nanopierce Technologies : The preemption doctrine, which provides that federal law supersedes conflicting state law, arises from the Supremacy Clause of the United States Constitution. The Supremacy Clause, found in Article VI, requires that the laws of the United States. . . shall be the supreme law of the land ...