New South Wales Consolidated RegulationsFor the purposes of section 510A of the Act, the maximum annual charge for stormwater management services that may be levied in respect of a parcel of rateable land is:
(a) for land categorised as residential-$25, and
(b) for land categorised as business-$25, plus an additional $25 for each 350 square metres or part of 350 square metres by which the area of the parcel of land exceeds 350 square metres.