In this Act, the
"responsible person" for plumbing and drainage work means--
(a) in the case of work carried out or proposed to be carried out by the holder of an endorsed contractor licence or a supervisor certificate under the Home Building Act 1989 authorising the holder to do the work, the holder of that licence or certificate, or
(b) in the case of work carried out or proposed to be carried out under the immediate or general supervision of the holder of an endorsed contractor licence or a supervisor certificate under the Home Building Act 1989 authorising the holder to supervise the work, the holder of the endorsed contractor licence or supervisor certificate.