Section 13
SEC. 13. The same Act is hereby amended by adding a new section to be known as Section thirty-three to read as follows: "SEC. 33. For purposes of this Act and unless otherwise indicated in the committee terms herein enumerated shall have the following meanings: "Agencies"&mdashmeans the National Institute of Science and Technology and the Philippine Atomic Energy Commission; "Radioactive material"&mdashmeans any material which spontaneously gives off ionizing radiation; "Source material"&mdashmeans uranium, thorium or any other material which is determined by the Commission to be source materials or ores containing one or more of the foregoing materials in such concentration as the Commission may by regulation determine from time to time; "Special nuclear materials"&mdashmeans plutonium, uranium, or any other material in sufficient quantity which the Commission determines to be capable of releasing substantial quantities of energy through nuclear chain reaction of the material."