5 Existing use rights are provided for under s 106 of the Environmental Planning and Assessment Act 1979 (the EP&A Act) which defines an existing use as the use of a building for a lawful purpose immediately before that use was prohibited under an environmental planning instrument. Section 107(2) imposes limits on the expansion of an existing use. The making of regulations concerning the carrying out of alterations or extensions to a building being used for an existing use, the change of an existing use to another use and the enlargement or expansion of an existing use are provided for under s 108. Clause 41 of the EP&A Regulation (cl 41(1)(e) and cl 41(1)(f) were added, and cl 41(1)(d) amended after 2005 ) states:
(1) An existing use may, subject to this Division:
(a) be enlarged, expanded or intensified, or
(b) be altered or extended, or
(c) be rebuilt, or
(d) be changed to another use, but only if that other use is a use that may be carried out with or without development consent under the Act, or
(e) if it is a commercial use - be changed to another commercial use (including a commercial use that would otherwise be prohibited under the Act), or
(f) if it is a light industrial use - be changed to another light industrial use or a commercial use (including a light industrial use or commercial use that would otherwise be prohibited under the Act).
(2) However, an existing use must not be changed under subclause (1) (e) or (f) unless that change:
(a) involves only alterations or additions that are minor in nature, and
(b) does not involve an increase of more than 10% in the floor space of the premises associated with the existing use, and
(c) does not involve the rebuilding of the premises associated with the existing use, and
(d) does not involve a significant intensification of that existing use, and
(e) relates only to premises that have a floor space of less than 1,000 square metres.
(3) In this clause:
commercial use means the use of a building, work or land for the purpose of office premises, business premises or retail premises (as those terms are defined in the Standard Instrument (Local Environmental Plans) Order 2006).
light industrial use means the use of a building, work or land for the purpose of light industry (within the meaning of the Standard Instrument (Local Environmental Plans) Order 2006).
6 It is agreed between the parties that if cl 41(1)(e) applies then cl 41(2) is not satisfied by the 2008 DA. It is also agreed that the use of the premises relies on existing use rights and that use is now defined by the 2005 consent.