Hi,
The issue is the SP registration date being pre 1974′ as the Centre Line rule applied befor 1974′ which placed the ownership of the floor slabs with the Lot Owners, so the slab may not be common property. However you can’t take this statement as advise. Many Strata Schemes have taken steps to change the Centre Line rule by creation of By-laws and other means, so what you need to do as far as determining what is common property is to get some professional advice. A good start is the lands title office which you can ask to make a determination on what they consider common property and also a number of Strata lawyers have expertise in pre 1974 Strata registration issues. (If you email me I can give you a couple of lawyers details that have expertise in this area)
It would seem that your building has some real building issues, I hope the OC has had a Building Consultant and/or Engineer to have a look at the issues and write a technical advice and a scope of works/specification to detail what remedial repairs are required and had that firm tender the works? I have just posted a full review on selecting contractors and scoping of works under the Forum The Professionals Bad Strata Manager HERE.
If we can help please send me an email (address below).
Chris Mo’ane AIAMA, MASBC-CPC
GMD Integrated Consultancy Group
Building Consultants, Engineers, Strata Consultants
Principal Sponsor OCN, Corporate Members SCA, FPA