20   Dual occupancy

(1)  Where development for the purposes of a dwelling-house may be carried out on an allotment of land to which this plan applies, a person may, with development consent, erect a dual occupancy building.

(2)  The Council shall not grant consent to the erection of a dual occupancy building, or the alteration of, or addition to, an existing dwelling-house so as to create a dual occupancy building, unless arrangements satisfactory to the Council have been made for the provision of a water supply to, and the disposal of sewage and stormwater drainage from, the land.

(3)  The Council may, in granting consent to the carrying out of development on land for the purpose of a dual occupancy building, impose a condition requiring the owner of the land to occupy one of the dwellings thereby created.