25. For regulation 47 substitute—
“47. The following regulations are designated as provisions to which section 35 of the Act (penalty for contravening building regulations) does not apply—
(a)regulations 17, 17A, 25A, 27, 29, 37, 41, 42, 43 and 44; and
(b)regulations 23, 25B and 26, in so far as these Regulations apply to Crown buildings or to building work carried out or proposed to be carried out by Crown authorities.”.