50 C.F.R. § 12.81
(a) If any fish, wildlife, plant, or item of evidence is seized or forfeited under the ESA (16 U.S.C. 1531 et seq.), you or any person whose act or omission was the basis for the seizure will be charged a reasonable fee for expenses to the United States connected with the transfer, boarding, handling, or storage of the seized or forfeited property. If any fish, wildlife, or plant is seized in connection with a violation of the Lacey Act Amendments of 1981 (16 U.S.C. 3371 et seq.), you or any person convicted or assessed a civil penalty for this violation will be assessed a reasonable fee for expenses of the United States connected with the storage, care, and maintenance of the property.