US HB3987

Prohibits sanctuary jurisdictions from receiving Community Development Block Grants (CDBG) under the Housing and Community Development Act of 1974

Defines "sanctuary jurisdiction" as any state or locality that restricts sharing citizenship/immigration status information with federal, state, or local governments, or refuses to comply with DHS detainer requests under sections 236 or 287 of the Immigration and Nationality Act

Requires CDBG grantees to certify they are not a sanctuary jurisdiction and will not become one during the grant period

Exempts jurisdictions from the sanctuary designation if their only non-compliance policy relates to individuals who come forward as victims or witnesses to criminal offenses

Amends Title I of the Housing and Community Development Act of 1974 (42 U.S.C. 5301 et seq.) to add eligibility restrictions