(1) A municipal firefighter, as defined in Title 30-A, section 3151, subsection 2; or a volunteer firefighter, as defined in Title 30-A, section 3151, subsection 4, who is operating a municipal vehicle; or
(2) An operator of a vehicle under Title 29-A, section 2054 that is licensed or authorized pursuant to Title 32, chapter 2-B as an ambulance or emergency medical services vehicle, when that operator is acting with the approval of an ambulance service or nontransporting service licensed pursuant to Title 32, chapter 2-B.