Lyndon Johnson actually said...
I, Lyndon B. Johnson, President of the United States, under the authority vested in me by section 2 of the act of June 8, 1906, supra, by the act of June 29, 1906 (34 Stat. 607, 16 U.S.C. 684), and by the act of June 4, 1897 (30 Stat. 34, 16 U.S.C. 473), do proclaim that, subject to valid existing rights, (1) federally owned or controlled lands within the exterior boundaries of the following described area are hereby reserved from all forms of appropriation under the public land laws and set apart as the Marble Canyon National Monument
01/20/1969