(1) A person shall not operate a commercial motor vehicle unless he or she is qualified to operate that vehicle. A motor carrier shall not require or permit a person to operate a commercial motor vehicle unless that person is qualified to operate that vehicle.

  (2) In the case of intrastate transportation, a person is qualified to operate a commercial motor vehicle if he or she meets all of the requirements of 49 C.F.R. § part parts 383 and 391, except all of the following provisions:

  (a) Except as otherwise provided in subdivision (b), the person is at least 18 years old when transporting intrastate property or passengers.

  (b) The person is at least 21 years old when transporting hazardous materials in a quantity that requires the vehicle to be marked or placarded under 49 C.F.R. § part parts 105 to 180.

  (c) The person is eligible for and displays a valid medical waiver card, is excepted from the medical waiver card provisions under this act, or, until December 31, 2014, displays a grandfather rights card issued in accordance with this act.