19 U.S.C. § 267a

section 267(e)(1) of this titleCash awards for foreign language proficiency may, under regulations prescribed by the Secretary of the Treasury, be paid to customs officers (as referred to in ) to the same extent and in the same manner as would be allowable under subchapter III of chapter 45 of title 5 with respect to law enforcement officers (as defined by section 4521 of such title).