No, it is at the institution’s discretion to allow attendees to carry firearms per the Maine Revised Statutes Title 25, section 2011.
Students should reach out towards school officials in order to seek policy change within their university to allow for campus carry, or seek legislative change in their state government to require colleges to permit the carry of a firearm.
Students could face charges for trespassing on the property which is a Class E misdemeanor with a maximum fine of $1000 and maximum prison sentence of 180 days, as well as potential repercussions from their educational institution for breaking school regulations.
Campuses are eligible under state law to issue the right to carry to any student, they should simply change their individual policy to permit the carry of a firearm.