Senate Bill 493 aims to prohibit state and local government officials, including law enforcement officers, from assisting in the detention of individuals solely based on their immigration status. Specifically, the bill states that no official, employee, or agent of a state agency or local governmental unit may aid in such detentions. However, it allows for the provision of access to places or facilities as required by a properly executed judicial warrant.

Additionally, the bill prohibits state agencies and local governmental units from entering into or continuing existing agreements with the federal government under section 287(g) of the federal Immigration and Nationality Act, which allows for certain immigration enforcement activities to be performed by state and local authorities. This legislation reflects a clear stance against collaboration with federal immigration enforcement efforts at the state and local levels.