(a) Time for payment. Full payment of the civil penalty must be made within 30 days of the date upon which the final order becomes effective, or within the time specified in the order. Payment shall be made in the manner specified in the NOVA.

(b) Enforcement of order. The Secretary, through the Attorney General, may file suit in an appropriate district court if necessary to enforce compliance with a final order issued pursuant to this part. This suit will include a claim for interest at current prevailing rates from the date payment was due or ordered or, if an appeal was filed pursuant to § 103.10, from the date of final judgment.

(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.