(1) Motor carriers with multiple fleets of vehicles may change the annual registration period for a fleet, upon request of the owner, to the same registration period of one or more of the owner's other fleets.

(2) The change of registration period for a fleet must be done during the renewal period assigned to the fleet before transfer.

(3) Gross vehicle weight fees will be prorated to the end of the new registration period.

(4) The annual registration period begins on the first day of a calendar quarter. As used in this subsection, "calendar quarter" means a period of three consecutive months which end on March 31, June 30, September 30, or December 31.