1806GOVERNMENT GAZETTE, WA 23 March 2017

1806 GOVERNMENT GAZETTE, WA 23 March 2017 3.5 Overcrowding The owner or occupier of a house shall not permit— (a) a room in the house that is not a habitable room to be used for sleeping purposes; (b) a habitable room in the house to be used for sleeping purposes unless— (i) for every person over the age of 10 years using the room there is at least 14 cubic metres of air space per person; and (ii) for every person between the ages of 1 and 10 years there is at least 8 cubic metres of air space per person; or (c) any garage, shed or area under a veranda or patio to be used for sleeping purposes. 3.6 Calculated sufficient space For the purpose of clause 3.5, in calculating the space required for each person— (a) each room shall be considered separately and sufficient space shall be allowed in each room for the number of persons present in the room at any one time; and (b) deduction shall be made for the space occupied by furniture, beds, equipment, fittings and projections of the walls into a room. 3.7 Ventilation (1) A person shall not use or occupy, or permit to be used or occupied, a house unless the house is properly ventilated. (2) For the purpose of subclause (1) a house shall be deemed to be properly ventilated if it complies with the Building Code, including the provision of— (a) natural ventilation; or (b) a mechanical ventilation or air-conditioning system complying with AS1668.2. (3) The owner of a house provided with a mechanical ventilation or air-conditioning system as its only or prime means of ventilation shall ensure that the system is— (a) maintained in good working condition and in accordance with AS3666; and (b) in use at all times the building is occupied. (4) If, in the opinion of an Authorised Officer, a house is not properly ventilated, the Authorised Officer may by notice require the owner of the house to— (a) provide a different, or additional method of ventilation; or (b) cease using the house until it is properly ventilated. 3.8 Sub-floor ventilation The owner or occupier of a house shall make provision for sub-floor ventilation by ensuring that air bricks and other openings are kept clear of refuse, vegetation, building materials, dirt and the like. Division 3—Water Supply 3.9 Water supply (1) The owner of every house shall provide a continuous supply of drinking water, reticulated for use and obtained from— (a) a licensed water service operator; (b) an underground bore; or (c) a rainwater storage system with a minimum capacity of 120,000 litres. (2) The water supply shall at all times deliver an adequate supply of drinking water to each tap in the house. (3) The water supply to toilets or for garden use may be from an alternative source that is not necessarily drinking water but must comply with the requirements of relevant legislation, codes of practice or guidelines where applicable. 3.10 Rainwater tanks The owner or occupier of a house for which the water supply is drawn from a rainwater tank shall ensure that it is managed and maintained so as to meet the relevant standards in the National Health and Medical Research Council Drinking Water Guidelines and in particular— (a) maintain in a clean condition— (i) the roof forming the catchment for the tank; and (ii) the guttering and downpipes appurtenant to the roof; (b) ensure that each rainwater tank is fitted with a tight-fitting mosquito proof cover which shall not be removed at any time except for the purpose of inspecting, cleaning, repairing or maintaining the tank; (c) if the tank water is breeding mosquitoes, eliminate the point of entry and treat with a small quantity of liquid paraffin at a rate of not more than 5 millilitres per square meter of surface area so as to form a thin even film over the whole surface or otherwise as advised by an Authorised Officer;