The proposed bill, titled the "Immigration and Customs Enforcement Support Act," mandates that certain law enforcement agencies in Michigan perform immigration officer functions under the supervision of federal immigration agencies, specifically the United States Immigration and Customs Enforcement (ICE). It establishes a framework for law enforcement agencies to create and operate a jail enforcement model or warrant service officer program, which would involve designating officers to assist ICE in enforcing immigration laws. Agencies must enter into a written agreement with the Department of Homeland Security and receive funding from the immigration and customs enforcement support fund before implementing these programs.

Additionally, the bill outlines specific responsibilities for law enforcement officers, including verifying the citizenship or immigration status of individuals before their release and transferring individuals who are not legally present in the U.S. to ICE custody upon their discharge from imprisonment or after fines are paid. The law enforcement agency is also required to adopt a written policy that aligns with the act's requirements and ensure that designated officers receive training from ICE-certified instructors. The act will only take effect if Senate Bill No. 42 is also enacted into law.