The Radioactive Substances (Smoke Detectors) Exemption Order 1980
This Order, which has been made by the Secretary of State for the Environment and the Secretary of State for Wales, exempts persons conditionally from registration under sections 1 and 3 of the Radioactive Substances Act 1960 in respect of the keeping and use of “radioactive material” within the meaning of section 18(1) of that Act consisting of smoke detectors incorporating closed sources possessing limited radioactivity.