42 U.S.C. § 16163
(a) Representation The Secretary may represent the United States interests with respect to activities and programs under this subchapter, in coordination with the Department of Transportation, the National Institute of Standards and Technology, and other relevant Federal agencies, before governments and nongovernmental organizations including—
(Pub. L. 109–58, title VIII, § 819, formerly § 814, , 119 Stat. 855; renumbered § 819, Pub. L. 117–58, div. D, title III, § 40314(1), , 135 Stat. 1008.)