Commowealth Act No. 136. an act Creating the Burau of Mines; Act.Nr. 137: The Mining Act, as amended; Act No. 2717 The Coal Land Act, as Amended; Act. No. 4271: mining Engineering Law of the Philippines; Act. No. 4209: Geology Profession Law of the Philippines - FILIPINAS. Department of Agriculture adn Natural Resources (Bureau of Mines, 1967)