(2) Such drain must be constructed of some impervious material, and must connect the floor of the privy or urinal—
(a) with a drain communicating with a municipal drain or sewer; or
(b) if permitted by the Commissioners, with an impervious cesspool, the contents of which can be removed either by hand, or by flow after filtration.
Floor.
6. (1) The floor of every privy and urinal—
(a) must, if the Commissioners in any case so direct, be made of one of the following materials to be selected by the owner of the privy or urinal, that is to say, glazed tiles, artificial stone or cement; or
(b) if no such direction is given, must be made of thoroughly well burnt earthen tiles or bricks plastered, and not merely pointed, with cement; and
(c) must be in every part at a height of not less than six inches above the level of the surface of the ground adjoining the privy or urinal.
(2) The floor of every privy and every urinal must have a fall or inclination of at least half an inch to the foot towards the drain prescribed by rule 5; and the platform must be similarly sloped towards the aperture.
Walls and roof.