The use of radioactive sources for teaching purposes in schools is governed by the Code of Practice on the Use of Radioactive Sources for Teaching Purposes in Schools issued by the Radiation Board.
Subject to (a) being fulfilled and if the aggregate activity of tritium in signs that are securely fixed at specified locations inside any specified premises is 1,000 GBq or less, user / possessor of tritium signs may be granted an exemption which is renewable triennially so that the administrative burdens to the Board can be reduced without unduly compromising the health and safety of the public.
No local disposal of tritium sign is permissible. All such signs are to be returned to the overseas manufacturer when they can no longer serve the dedicated purpose of usage.
Radiation Board has granted exemption to retailers and end-users of self-luminous timepieces that contain gaseous tritium light sources. From the requirements of the Radiation Ordinance, it provides that:
A notice of the exemption has been published in the Gazette.