Proposing an amendment to the Constitution of the United States to require that the Supreme Court be composed of not more than nine justices.

H.J. Res. 39 proposes a constitutional amendment to limit the U.S. Supreme Court to no more than nine justices. This would prevent future increases in the Court's size beyond its current nine-member structure. Congress would have the power to create laws enforcing this cap if the Court exceeded nine justices. The amendment would directly affect the Court's composition and the process for appointing justices.