(1)  For the definition of prescribed work in section 3(1) of the Act, the following work is determined to be prescribed work, unless exempted under section 99(1)(b) of the Act:

(a) work carried out on, or as part of, the design, construction, installation, replacement, repair, alteration, maintenance, servicing, testing, commissioning, decommissioning or removal of any part of the following plumbing installations or systems:

(i) sanitary;

(ii) water;

(iii) drainage;

(iv) roof (stormwater);

(v) mechanical services;

(vi) refrigerated air conditioning;

(b) plumbing work carried out in or on an unregistrable relocatable building within the meaning of the Building Act 2000 .

(2)  Despite subregulation (1) , the following work is not prescribed work:

(a) any work carried out in relation to a supply or discharge reticulation system or a treatment plant or any equipment, appliance, fixture or system associated with that system or plant (other than any equipment, appliance, fixture or system used mainly for administrative, domestic, fire protection or ablution purposes), owned by, or exclusively vested in –

(i) the holder of a water licence or a sewerage licence under the Water and Sewerage Industry Act 2008 ; or

(ii) a council when the work is for stormwater drainage system purposes;

(b) the opening or closing of inspection opening caps and covers in sewage, stormwater and waste pipes;

(c) the connection, for water use, of hoses to taps for the purpose of –

(i) appliances such as dishwashers and clothes-washing machines; or

(ii) activities that use water, including cleaning or watering a garden;

(d) the connection of domestic irrigation systems or devices to hose taps for the purpose of watering a garden or irrigation if –

(i) there is no fertiliser or herbicide injection system associated with the irrigation system; and

(ii) an appropriate backflow prevention device has been installed by a licensed plumber;

(e) design work, where the design work is carried out by an accredited building practitioner (designer) under the Building Act 2000 working within his or her area of competence as a building designer, building services designer or an engineer;

(f) the removal of all or part of a plumbing installation or system which has been isolated or decommissioned by an appropriately licensed plumber;

(g) the installation of a stove, heater or any similar appliance that burns oil or solid fuel but does not include the flashing of flues penetrating roof coverings, or devices used for the heating of water;

(h) welding undertaken in the manufacture, alteration or repair of a pressure vessel by a person who holds a certificate, in accordance with AS1796, that is relevant to the work being undertaken, or an equivalent certificate acceptable to the Administrator;

(i) the removal of sludge and composting matter from an on-site waste water management system.