Assembly Bill 57 aims to restrict the involvement of state and local officials in the detention of individuals solely based on their immigration status. The bill prohibits any official, employee, or agent of a state agency or local governmental unit, including law enforcement officers, from aiding in the detention of individuals who are or are alleged to be not lawfully present in the United States. This prohibition applies specifically to detentions occurring in public buildings, schools, places of worship, child care facilities, and health care services. However, the bill allows for access to these facilities if required by a properly executed judicial warrant.

Additionally, the bill stipulates that no person lawfully present at these facilities can be compelled to assist federal officials in detaining individuals based solely on their immigration status, unless a judicial warrant is involved. Furthermore, it prohibits state agencies from using any funds to assist in such detentions. Overall, the bill seeks to limit the role of state and local entities in federal immigration enforcement within specific public spaces.