Qualification
5.—(1) For the purposes of these Regulations an officer shall be qualified if he is the holder for the time being of a certificate of competency issued under these Regulations, or of a certificate which is to be treated as equivalent to such a certificate by virtue of these Regulations and, at the material time, such certificate is in force in relation to the person named in it and is of a type (whether deck or engineer) and class appropriate to the officer's capacity in the vessel.
(2) The provisions of regulations 3 and 4, insofar as they impose a requirement with respect to the carrying in a vessel of a qualified officer who is the holder of a certificate of competency issued under these Regulations of a particular class, shall be treated as complied with if the officer who is carried in pursuance of that requirement is the holder of a certificate of competency issued under these Regulations of a higher class or of a certificate which is to be treated as equivalent to such a certificate of a higher class by virtue of these Regulations.