(1) "Authorized emergency vehicle" means any 1 of the following:

    (a) Vehicles of the fire department, police vehicles, ambulances, privately owned motor vehicles of volunteer or paid fire fighters, or volunteer members of an emergency rescue unit if authorized by the chief of an organized fire department, a county sheriff, or the director of the department of state police, or privately owned motor vehicles of volunteer or paid members of a life support agency licensed by the department of licensing and regulatory affairs if authorized by the life support agency.

    (b) For purposes of section 698(5)(c) during an emergency, a vehicle owned and operated by a federally recognized nonprofit charitable organization that is used exclusively for assistance during that emergency.

    (c) For purposes of section 653a, a road service vehicle giving a visual signal by means of a flashing, rotating, or oscillating red or amber light. As used in this subdivision, "road service vehicle" means a vehicle that is clearly marked and readily recognizable as a vehicle used to assist disabled vehicles.

    (2) As used in this section:

    (a) "Emergency rescue unit" means an entity with training in a specialized discipline exceeding the level of training for medical first responders.

    (b) "Life support agency" means that term as defined in section 20906 of the public health code, 1978 PA 368, MCL 333.20906.

    (c) "Medical first responder" means that term as defined in section 20906 of the public health code, 1978 PA 368, MCL 333.20906.