Prohibits U.S. courts from enforcing foreign law or foreign legal systems — including Shari’a — when enforcement would violate a person’s constitutional rights, and clarifies that U.S. law is supreme in U.S. courts. The bill defines key terms (court, foreign law, fundamental rights), preserves parties’ ability to choose foreign law in contracts only so long as enforcement does not conflict with constitutional protections, and restricts use of foreign law in family and other matters when it would infringe fundamental rights or public policy.

Directs the U.S. Attorney General to issue regulations and provide nationwide judicial education to ensure uniform application, includes a severability clause so other provisions remain effective if part is struck down, and becomes effective 180 days after enactment.