Clause 9(3) of Schedule 2 provides that a decision of the strata committee has no effect if owners of one-third of unit entitlements give notice in writing of their opposition before the decision is taken.
Before heading in to NCAT, if you have the agreement of owners holding one-quarter of unit entitlements then a qualified request for a general meeting can be made pursuant to s19 SSMA. This would provide an opportunity for the decision/s of the strata committee to be overturned by the owners corporation. As the meeting must be convened within 14 days of the qualified request, this is much speedier than applying for mediation then filing in NCAT.