75-2-423. Manner of making payment. (1) The assessed penalty required under 75-2-421 through 75-2-429 shall be paid in quarterly installments for the period of covered noncompliance. All quarterly payments, determined without regard to any adjustment or any subtraction under 75-2-422(1)(b), after the first payment shall be equal.
(2) The first payment shall be due on the date 6 months after the date of issuance of the notice of noncompliance under 75-2-425 with respect to any source. Such first payment shall be in the amount of the quarterly installment for the upcoming quarter, plus the amount owed for any preceding period within the period of covered noncompliance for such source.
(3) For the purpose of this section, the term "period of covered noncompliance" means the period which begins on the date of issuance of the notice of noncompliance under 75-2-425 and ends on the date on which such source comes into or, for the purpose of establishing the schedule of payments, is estimated to come into compliance with such requirement.