reg 6 Revalidation of certificates
(1) The certificate of a master or other officer issued with a certificate under regulation 4 or 5 shall not be valid for sea-going service unless revalidated at intervals not exceeding 5 years to establish continued professional competence in accordance with section A-I/11 of the STCW Code. (2) A certificate of a category referred to in regulation 9 granted pursuant to the Merchant Shipping (Radio Installations) Regulations 1992 shall not be valid for sea-going service unless revalidated at intervals not exceeding 5 years, to establish continued professional competence in accordance with section A-I/11 of the STCW Code. (3) Every master and officer shall, for continuing sea-going service on ships referred to in regulations 10, 11 and 12, successfully complete approved refresher training at intervals specified by the Secretary of State.