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Bill

H 602

FOREIGN LAWS – Adds to existing law to establish provisions prohibiting the use of foreign laws in Idaho courts.

68th Legislature, 2nd Regular Session (2026)

Idaho law prohibits state courts from applying or referencing foreign laws in judicial decisions, requiring exclusive reliance on Idaho, federal law, and U.S. Constitution.

Reported Signed by Governor on March 26, 2026 Session Law Chapter 183 Effective: 07/01/2026
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Bill Summary · H 602

Legislative bill overview

H 602 prohibits Idaho courts from applying or considering foreign laws in legal proceedings. The bill establishes that Idaho courts must rely exclusively on Idaho state law, federal law, and the U.S. Constitution when making judicial decisions. This applies across civil and criminal cases.

Why this is important

Courts occasionally reference international law or foreign legal principles when interpreting constitutional rights or contract disputes, particularly in family law cases involving international custody. This bill would eliminate that practice, potentially affecting cases involving foreign nationals, international contracts, or comparative legal analysis. It reflects a broader national debate about judicial sovereignty and the role of international legal principles in American courts.

Potential points of contention

  • Religious law concerns: While framed broadly, the bill may be intended to prevent courts from recognizing religious law systems (Islamic Sharia, Jewish Halakha), raising questions about religious freedom and cultural accommodation in civil disputes
  • International commerce impact: Businesses engaged in international contracts sometimes rely on comparative legal analysis; restrictions could complicate dispute resolution and enforcement of international agreements
  • Practical judicial application: Courts rarely apply foreign law as binding authority, making the measure's practical necessity questionable, though clarifying legislation may still have value for preventing edge cases

Compiled from official sources — confirm details with the bill’s official record.

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