(c)A specification of such description of work proposed to be executed and of the materials to be employed. Such specification shall include a description of the proposed method of drainage of the building intended to be erected and of the sanitary fittings to be used and also of the means of water-supply and shall if required by the Executive Officer, be supplemented by detailed calculation showing the sufficiency of the strength of any part of such building. The specification shall also include the colour scheme that is to be used on the outer walls.
