This legislation aims to impose strict requirements on the Department of Homeland Security (DHS) and other federal agencies before they can establish new U.S. Immigration and Customs Enforcement (ICE) processing sites or detention centers. It prohibits the construction, acquisition, renovation, or operation of such facilities unless specific conditions related to public engagement, local consent, and congressional oversight are met. The bill defines a "new processing site or detention center" as any facility operated by or contracted with ICE, including those under the Detention Reengineering Initiative, used to temporarily hold persons pending immigration removal operations, beginning on or after the act's enactment. Before any new facility can proceed, the relevant federal agency must issue a public notice in the Federal Register, open for at least 30 days of comments, detailing the project's scope, due diligence, environmental regulations, and including an economic impact analysis and engineering review . Following the comment period, the agency head must respond to significant feedback and secure a signed, written agreement with appropriate local government officials and the State Governor. Finally, Congress must receive at least 30 days' advance notice, including a copy of the executed agreement, submitted to several key Senate and House committees.