Paragraph 16.1For use of the following radioactive material, a registration application shall be made to the competent authority for filing and reference:1.sealed radioactive material of Category IV and Category V as listed in Table I;2.radioactive material that forms a component of an instrument or manufactured product and that has an activity less than 1,000 times that of the exemption level and that under normal usage has a surface dose rate at an accessible distance of 5 cm of less than 5 microsieverts (μSv) per hour;3.radioactive material other than those referred to in the preceding two subparagraphs with an activity less than 100 times that of the exemption level; or4.other radioactive material as designated by the competent authority.Paragraph 16.2For use of radioactive material other than those stipulated in the preceding paragraph, an application for a permit shall be made to the competent authority.Table I：Categories of Sealed Radioactive Material.PDF