N.M. Admin. Code § 17.7.4.18
A utility may file a request for a variance from the requirements of this rule or to amend its IRP filing to reflect substantially changed circumstances. Such application shall describe the situation which necessitates the variance; set out the effect of complying with this rule on the utility and its customers if the variance is not granted; identify the section(s) of this rule for which the variance is requested; describe the expected result that the request will have if granted; and state how the variance will aid in achieving the purposes of this rule. The commission may grant a request for a procedural variance through an order issued by the chairman, a commissioner or a designated hearing examiner. Other variances shall be presented to the commission as a body for determination.
N.M. Admin. Code § 17.7.4.18