N.M. Code R. § 3.11.4.13
B. Because the motor vehicle excise tax is not imposed on manufactured homes, the value of a manufactured home trade-in on the purchase of a vehicle other than a manufactured home may not be deducted in determining the taxable value of the purchased vehicle. For the same reason, when the owner of a vehicle whose liability for the motor vehicle excise tax was suspended pursuant to Section 7-14-7.1 NMSA 1978 trades the vehicle in on the purchase of another vehicle, the owner may not deduct the value of the trade-in vehicle in the determining the taxable value of a purchased vehicle.
[10/29/99; 3.11.4.13 NMAC - Rn & A, 3 NMAC 11.4.13, 12/14/00]