Space National Guard Establishment Act

S 503 establishes a new Space National Guard as a reserve component of the U.S. Space Force, composed of state-level units in areas where the Space Force operates. It directly affects National Guard members in participating states, territories, Puerto Rico, and D.C., who would join this new space-focused reserve force. The bill requires implementation within 18 months and mandates annual congressional briefings on its progress, including missions, personnel, and funding. It also clarifies definitions in military law and explicitly states the bill won’t require relocating existing military installations.