relative to cooperation with federal immigration authorities.

HB 511 allows New Hampshire counties to hold Immigration and Customs Enforcement (ICE) detainees for up to 48 hours (excluding weekends and holidays) after state charges conclude, but only if the county has a signed agreement covering costs and medical expenses. Counties without such agreements are not required to hold ICE detainees. The bill directly affects county correctional facilities and their agreements with federal immigration authorities. It became law on May 22, 2025, and takes effect January 1, 2026.