Judge temporarily blocks new Montana campus carry law May 28, 2021 FacebookTwitterEmail HELENA, Mont. (AP) — A judge temporarily blocked on Friday a new law allowing firearms to be carried on public university campuses in Montana. The law passed earlier this year would have gone into effect June 1. The temporary order issued by Judge Mike McMahon of the Lewis and Clark County District Court sets a June 7 hearing in the case. The Montana University Board of Regents, which oversees Montana's university system, filed a challenge in the district court seeking to block the new law on Thursday. The university system’s existing policy prohibits anyone other than law enforcement or contracted security staff from carrying firearms on campus.