27 C.F.R. § 555.110
(a) In general. Licensed manufacturers and licensed importers and persons who manufacture or import explosive materials or ammonium nitrate must, when required by letter issued by the Director, furnish—
(b) Reimbursement. The Director will reimburse the fair market value of samples furnished pursuant to paragraph (a) of this section, as well as reasonable costs of shipment.
(Approved by the Office of Management and Budget under control number 1140-0073)
[ATF No. 1, 68 FR 13790, Mar. 20, 2003]