The Secretary of State, in consultation with the Council on Environmental Quality, is encouraged to enter into negotiations with the governments of Canada and Mexico to provide for reciprocal cooperative environmental impact analysis of major Federal actions which have significant transboundary effects on the quality of the human environment in the United States, Canada, and Mexico.

(Pub. L. 101–646, title I, § 1401, Nov. 29, 1990, 104 Stat. 4773; Pub. L. 104–332, § 2(h)(1), Oct. 26, 1996, 110 Stat. 4091.)