An Act relative to immigration detention and collaboration agreements

This bill prohibits Massachusetts state and local government agencies (including police departments, sheriff's offices, and correctional facilities) from entering new agreements with federal immigration authorities for immigration enforcement or detention. It also requires all existing agreements of this type to end within 30 days (for enforcement agreements) or 90 days (for detention agreements) after the law takes effect. The Attorney General can enforce the law by seeking court orders to stop violations. The bill directly affects how Massachusetts law enforcement interacts with federal immigration authorities regarding detention and enforcement.