46 C.F.R. § 401.427 Charge on past due accounts.
Title 46 - Shipping
A charge of two percent (2%) per month shall be paid on the opening monthly balance on accounts remaining unpaid over thirty (30) days after the billing date. [CGD 79–138, 45 FR 13078, Feb. 28, 1980. Redesignated at 61 FR 32655, June 25, 1996, and further redesignated by USCG–1998–3976, 63 FR 35139, June 29, 1998]
Title 46: Shipping
PART 401—GREAT LAKES PILOTAGE REGULATIONS
Subpart D—Rates, Charges, and Conditions for Pilotage Services
§ 401.427 Charge on past due accounts.