Section 1. The barangays of Ilihan, Sinai, Sibagat, El Rio, Afga, Tabontabon, Perez, Magsaysay, Santa Cruz, Santa Maria, San Isidro, Villangit, Del Rosario, Anahauan, Mahayahay and San Vicente, all in the Municipality of Bayugan, Province of Agusan del Sur, are hereby separated from said municipality to form and constitute an independent Municipality of Sibagat without affecting in any manner the legal existence of the mother Municipality of Bayugan.