Answer:
It is called the MSSA, or Military Selective Service Act, later known as the SSA, Selective Service Act.
Step-by-step explanation:
The Military Selective Service Act (MSSA), first enacted as the Selective Service Act of 1948, provides the statutory authority for the federal government to maintain a Selective Service System (SSS) as an independent federal agency responsible for delivering appropriately qualified civilian men for induction into the military.