SECTION 1. Republic Act Numbered Forty-six hundred nineteen is hereby amended by inserting a new section between Sections one and two thereof to read as follows:
"SEC. 1-A. If the grantee shall not commence operation of its electric light system by serving the general public in the municipalities of Bacong, Dauin and Valencia, all in the Province of Oriental Negros, within one year from the approval of this amendatory Act, this franchise shall become null and void in said municipalities."