INTEREST AND PENALTIES.

(a) If royalty is not paid when due, a penalty of one percent shall be added to the unpaid amount due. If the royalty is not paid within seven days after the due date, a penalty of an additional four percent of the royalty due is imposed. If the royalty is not paid within 30 days after the due date, a penalty of an additional five percent is imposed. The minimum penalty under this subsection is $25 or the minimum penalty in excess thereof set by the board. The board shall not add a penalty under this subsection in cases of title dispute as to the state's portion of the royalty or to that portion of the royalty in dispute as to fair market value.

(b) Interest shall accrue on delinquent royalties beginning on the 61st day after the due date. The annual interest rate on delinquent royalties is 12 percent. Interest accrued under this subsection shall be in addition to any delinquency penalty due under this section.

(c) The board of regents shall add a penalty of 25 percent to delinquent sums due under this subchapter if the board determines that the delinquency is due to fraud or an intent to evade the provisions of this subchapter on the part of the lessee or the lessee's agents, employees, or assignees.

(d) If a report, affidavit, supporting document, or other instrument required to be filed under Section 66.77 or Section 66.80 is not filed when due, a penalty accrues in the amount set by the board but not less than $10 per document for each 30-day period of delinquency or fractional part thereof.

(e) Collection of penalty and interest charges under this section are in addition to any rights, including forfeiture, that the board or the board of regents may exercise for failure to pay a royalty or to submit a report or other instrument when due.

(f) The board may provide by rule procedures and standards for reduction of interest charged or penalties assessed under this subchapter or other interest or penalties assessed relating to unpaid or delinquent royalties or other amounts due.