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.
Rebuttable presumption. Both in common law and in civil law, a rebuttable presumption (in Latin, praesumptio iuris tantum) is an assumption made by a court, one that is taken to be true unless someone comes forward to contest it and prove otherwise.