Pub. L. 93–620, § 1, Jan. 3, 1975, 88 Stat. 2089, provided that: “This act [enacting sections 228a to 228j of this title, amending section 227 of this title, and repealing section 223 of this title] may be cited as the ‘Grand Canyon National Park Enlargement Act’.”

Pub. L. 102–581, title I, § 134, Oct. 31, 1992, 106 Stat. 4887, provided that the Administrator of the Federal Aviation Administration, in consultation with the Director of the National Park Service, the State of Arizona, the State of Nevada, the Clark County Department of Aviation, affected Indian tribes, and the general public, would conduct a study and submit a management plan on increased air traffic over Grand Canyon National Park.