Hi Melissa,
The McKenzie v Randwick City Council NSWLEC 42 (26 February 1996) in the Case Law section on the NSWRP website talks about dominant use and is related to mixed development which it looks like your enquiry relates to (as you have posted it on the mixed development section of the forum).
Most of the cases are about dominant use so if you can be more specific about your enquiry I may be able to direct you to some other relevant cases specific to your enquiry.
Kind regards,
Matthew
