Nothing contained in the Motor Transportation Act [Chapter 65, Articles 1, 3 and 5 NMSA 1978] relating to the full reciprocity registration of fleet vehicles shall be construed as requiring any vehicle to be registered pursuant to the international registration plan if it is otherwise registered in this state for the operation in which it is engaged, including, but not by way of limitation, registration, temporary registration permit or trip permit.
NMS § 66-3-2.10