section 691 of this titleSuch lands, when acquired in accordance with the provisions of , shall constitute the Cheyenne Bottoms Migratory Bird Refuge, and shall be maintained as a refuge and breeding place for migratory birds included in the terms of the convention between the United States and Great Britain for the protection of migratory birds concluded .
June 12, 1930, ch. 469, § 2 46 Stat. 579 (, .)