(a) Time for payment. Full payment of the civil penalty must be made within 30 days of the effective date of the order or within such longer period of time as may be specified in the order. Payment shall be made in the manner specified in the NOVA.

(b) Enforcement of order. The government party may, through the Attorney General, file suit in an appropriate district court if necessary to enforce compliance with a final order issued under the CWCR. This suit will include a claim for interest at current prevailing rates from the date payment was due or ordered.

(c) Offsets. The amount of any civil penalty imposed by a final order may be deducted from any sum(s) owed by the United States to a respondent.