N.M. Code R. § 12.2.4.20
Advertised prices available to all:
B. It is an unfair or deceptive trade practice for a dealer to sell a vehicle at a price above the advertised price of the vehicle regardless of whether the advertised price has been actually communicated to the purchaser prior to the sale; provided that this provision does not prevent dealers from requiring customers to present a coupon or copy of the advertisement to obtain the advertised price if the advertisement clearly and conspicuously discloses that a coupon or copy of the advertisement must be presented.
[5-1-98; Recompiled 10/15/01]