The bill introduces a new chapter, Chapter 169, titled "Detention for Federal Civil Immigration Violations," into Title 42 of the General Laws. It prohibits state and municipal government officials or bodies, as well as their instrumentalities or agencies, from entering into, renewing, or agreeing to any contracts or agreements that would be used to detain individuals for federal civil immigration violations. This prohibition includes intergovernmental services agreements and any leases or other agreements that facilitate the use of public real property for such purposes.

Additionally, any state or municipal governmental official or body that is a party to any existing agreement related to the detention of individuals for federal civil immigration violations is required to exercise the termination provision of that agreement, ensuring it is no longer used for such purposes by July 1, 2026.

The bill also includes a severability clause, stating that if any clause, sentence, paragraph, section, or part of this chapter is adjudged by a court of competent jurisdiction to be unconstitutional or otherwise invalid, that judgment shall not affect, impair, or invalidate the remainder of the chapter.

The act is set to take effect immediately upon passage.