A. Interest shall accrue on delinquent child support at the rate of four percent and spousal support at the rate set forth in Section 56-8-4 N.M. Stat. Ann. in effect when the support payment becomes due and shall accrue from the date the support is delinquent until the date the support is paid.

B. Interest shall accrue on a consolidated judgment for delinquent child support at the rate of four percent when the consolidated judgment is entered until the judgment is satisfied.

C. Unless the order, judgment, decree or wage withholding order specifies a due date other than the first day of the month, support shall be due on the first day of each month and, if not paid by that date, shall be delinquent.

D. In calculation of support arrears, payments of support shall be first applied to the current support obligation, next to any delinquent support, next to any consolidated judgment of delinquent support, next to any accrued interest on delinquent support and next to any interest accrued on a consolidated judgment of delinquent support.

E. The human services department [health care authority department] shall have the authority to forgive accrued interest on delinquent child support assigned to the state not otherwise specified in an order, judgment, decree or income withholding order if, in the judgment of the secretary of human services, forgiveness will likely result in the collection of more child support, spousal support or other support and will likely result in the satisfaction of the judgment, decree or wage withholding order. This authority shall include the ability to authorize the return of suspended licenses.