41 C.F.R. § 102-36.225
When foreign excess property is to be returned to the U.S. for the purpose of an approved transfer or donation under the provisions of 40 U.S.C. 521-529, 549, and 551, the Federal agency, State agency, or donee receiving the property is responsible for all direct costs involved in the transfer, which include packing, handling, crating, and transportation.