A joint resolution requiring the United States to continue during fiscal year 1988 the existing United States-Soviet Union mutual moratorium on testing antisatellite (ASAT) weapons against objects in space so long as the Soviet Union does the same and urging the President to seek with the Soviet Union a mutual and verifiable treaty placing the strictest possible limitations on the testing, deployment, and use of antisatellite weapons.

Prohibits the United States from carrying out a test of the Space Defense System (antisatellite weapon) involving the miniature homing vehicle against an object in space until the President certifies to the Congress that the Soviet Union has conducted, after enactment of this Act, a test against an object in space of a dedicated antisatellite weapon. Provides that such prohibition expires on October 1, 1988.

Declares that the President should seek with the Soviet Union a mutual and verifiable treaty which limits the testing, deployment, and use of any antisatellite weapon.