N.M. Admin. Code § 8.50.108.13
The IV-D agency conducts a review for modification of support orders in the IV-D caseload three years from the effective date of the last support order. At the time of review, if the case is actively receiving public assistance, the IV-D agency must pursue a modification either upward or downward if its review indicates that there will be at least a twenty percent change from the current obligation of support. The review is conducted based on information provided by the parties and other sources that report income. Both parties are sent notice at the time of review to request current information from them regarding income, childcare costs, medical expenses to include insurance premiums, and any other appropriate expenses that are considered by the child support guidelines. Both parties are notified of the result of the review conducted by the IV-D agency. If the IV-D agency chooses not to pursue a modification, any party may independently pursue their own request for a modification of a support order. The state may initiate a review of an order, without a specific request for review, if information is received by the IV-D agency that the non-custodial parent will be incarcerated for more than 180 calendar days, pursuant to the conditions specified in 45 CFR § 303.8(b)(2), (7), and (c). Under 45 CFR § 302.56 (c)(3), incarceration may not be treated as voluntary unemployment when a support order is being modified.
N.M. Admin. Code § 8.50.108.13