The annual volumetric limit for a water allocation to take unsupplemented water is—
(a) for an authorisation that states an annual volume of water—the stated volume; and
(b) for an authorisation that states the area that may be irrigated—the volume decided by the chief executive having regard to the volume of water required to efficiently irrigate the area, but not more than the volume, expressed in megalitres, calculated by multiplying the area, in hectares, by—(i) for conditional licences—3.3; and(ii) for other licences—4.4; and
(c) for another authorisation—the volume decided by the chief executive having regard to—(i) the conditions under which water may be taken under the authorisation; and(ii) the water taking capacity of any existing works for taking water under the authorisation; and(iii) the annual volumes of water estimated by the chief executive to have been taken under the authorisation during the period, of not more than 10 years, immediately before the commencement of this plan; and(iv) the efficiency of the use of the water mentioned in subparagraph (iii).