Retail Tenancy Unit (RTU) is a part of the NSW Department of State and Regional Development. Their site is designed to assist the retail leasing industry in NSW to prevent and resolve tenancy disputes. It also provides useful links to the major retail industry associations.
See the FAQ about retail tenancies deep in their infokit. Many of these answers have been provided by industry advisors and organisations.
However, it is a pity that the FAQ information is wrapped in a large Flash file because you will need an up-to-date Flash viewer to see it and it could take some time to download depending on the speed of your internet connection.