172Gasfitter to hold certificate

172 Gasfitter to hold certificate (1) A person shall not carry out gasfitting unless he is the holder of a certificate or a provisional certificate and: (a) the gasfitting is of a type authorized by the certificate or provisional certificate; and (b) where the gasfitting is being carried out by the holder of a provisional certificate, he is under the supervision of the holder of a certificate. (2) The Competent Authority may for a period of 2 years from the date of commencement of these Regulations, on the application of a holder of a provisional certificate, exempt the holder from the requirement of subregulation (1)(b) and where such exemption is given, the holder shall be deemed to be the holder of a certificate for such period as the exemption remains in force.