# The Radioactive Substances (Smoke Detectors) Exemption Order 1980, Article 6: Exemption under section 1 subject to limitations


(1) The exemption granted by Article 3 in respect of the keeping and use of radioactive material which is a smoke detector falling within Article 4(a) and is not affixed or attached to premises is granted subject to the limitation that the total number of such smoke detectors present on the premises at any given time does not exceed 100.
(2) The exemption granted by Article 3 in respect of the keeping and use of radioactive material which is a smoke detector falling within Article 4(b) is granted subject to the conditions that—
(a) no incorporated source is mutiliated;
(b) whenever there are reasonable grounds for believing or suspecting that an incorporated source has been lost or stolen,—
(i) notification to that effect is given forthwith, by the quickest means available, to a member of a police force and to the Secretary of State and confirmed to the latter in writing as soon as practicable; and
(ii) all reasonably practicable measures are taken forthwith for the purpose of recovering the source; and
(c) whenever there are reasonable grounds for believing or suspecting—
(i) that the immediate container or the bonding forming part of an incorporated source is broken or damaged; or
(ii) that any radioactive material has become detached or has escaped from an incorporated source because of some defect therein,
notification to that effect is given forthwith, by the quickest means available to the Secretary of State and confirmed to him in writing as soon as practicable.

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Source: https://www.legislation.gov.uk/uksi/1980/953/article/6 (the official version)
Page: https://openlegislation.uk/radioactive-substances-smoke-detectors-exemption-order-1980/article-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.