N.M. Code R. § 3.19.4.9
The sales values for resources for which the gross value is determined by the provisions of Subsections E, F and G of Section 7-26-4 NMSA 1978 will be the following monthly average index prices as published in Metals Week:
D. Silver will be the London spot, U.S. equivalent.
[8/14/84, 7/31/96; 3.19.4.9 NMAC - Rn, 3 NMAC 19.4.9, 1/15/01]