The following special fees will be assessed if a grazing rental payment is not paid in the time and manner required, in addition to any interest or late payment penalties which must be paid to the Indian landowners under a permit. The following special fees will be assessed to cover administrative costs incurred by the United States in the collection of the debt:
The permittee will pay * * * | For * * * |
(a) $50.00 | Administrative fee for checks returned by the bank for insufficient funds. |
(b) $15.00 | Administrative fee for the BIA processing of each demand letter. |
(c) 18% of balance due | Administrative fee charged by the Department of Treasury for collection. |
25 C.F.R. § 166.420