Regulation 20 of the Principal Regulations is amended by omitting subregulation (3) and substituting the following subregulation:(3) The builder must ensure that the following documents are on the site while the building work is being carried out:(a) the documents referred to in subregulation (1)(b) ;(b) if there is any variation of the building work (i) the written consent of the building surveyor given under section 85(2) of the Act; and(ii) the amended design documentation certified under section 85(3)(b) of the Act.Penalty: Fine not exceeding 20 penalty units and, in the case of a continuing offence, a further fine not exceeding 10 penalty units for each day during which the offence continues.