Enforcement Rules of the Atomic Energy Law Article 2
According to section 2 of Article 2 of this law “nuclear source material” means:1. Thorium ore, uranium ore, or mixed ore of uranium and thorium in which the rate of content weight uranium and thorium is higher than five-ten thousandths.2. Uranium and thorium in physical or chemical form or the mixture of uranium and thorium, excluding the nuclear fuel indicated in Article 3.3. Any other material which is designated by the Executive Yuan as nuclear source material.