The Strata Community Australia (NSW) have a Code of Ethics for members. This can is located in the ‘Consumer Info’ top of page menu at http://www.nsw.stratacommunity.org.au in the Consumer Info menu.
To make a compliant about a strata manager, who is a member, you need the endorsement of the Executive Committee unless “the circumstances are very unusual and extreme” (See SCA (NSW) Complaints Management Form Item 4 ‘IMPORTANT NOTE’.