An Act relative to Massachusetts state sovereignty

This bill prohibits Massachusetts state law enforcement agencies, municipalities, and other subdivisions from entering into, extending, or renewing any contracts with the federal government. The law specifically targets agreements related to civil immigration detention and restricts such partnerships to a maximum of ninety days after the bill takes effect. It empowers the state Attorney General to sue entities that violate these restrictions and allows private citizens to file lawsuits against violators. The legislation aims to limit state involvement in federal immigration enforcement while ensuring that local officers can still perform their standard public safety duties.