Ring warsa 1972, Meksiko ngukuhang Ley Federal Sobre Monumentos y Zonas Arqueológicas, Artisticas e Históricas (Undang-undang Federal majeng Monumen miwah Situs Arkeologi, Seni, lan Bersejarah) sané ngagenahang monumen nasional pra-Columbus sami rumasuk sané magenah ring Chichen Itza ring sor duwen federal.
In 1972, Mexico enacted the Ley Federal Sobre Monumentos y Zonas Arqueológicas, Artísticas e Históricas (Federal Law over Monuments and Archeological, Artistic and Historic Sites) that put all the nation's pre-Columbian monuments, including those at Chichen Itza, under federal ownership.