This bill aims to prohibit the allocation of federal funds through congressional earmarks to states or local governments designated as "sanctuary jurisdictions." It specifies that no federal funds may be used for such earmarks if the recipient jurisdiction meets the defined criteria. A "sanctuary jurisdiction" is broadly defined as any state or political subdivision with a policy that restricts government entities from sharing information about an individual's immigration status or complying with lawful requests from the Department of Homeland Security for detainers or release notifications. However, an exception is made for policies solely protecting victims or witnesses of criminal offenses. This prohibition on earmarks would become effective for fiscal year 2026 and all subsequent fiscal years.