Blocking System.
Section 5
SECTION 5. Blocking System. — The Energy Development Board shall establish coal regions delimiting its extent and boundaries after taking into consideration the various coal bearing lands of the Philippines. Each coal region shall be divided into meridional blocks or quadrangles of two minutes (2') of latitude and one and one-half minutes (1-1/2) of longitude, each block containing an area of one thousand (1,000) hectares, more or less, the boundaries thereof to coincide with the full two minutes and one and one-half minutes of latitude and longitude, respectively, based on the Philippine Coast and Geodetic Survey Map, scale of 1:50,000.