To add to my previous comment … the OC has the power to seek an Order regarding rectification of damage to common property via SSMA 2015 [s132]. Why does your Strata Committee believe that it requires additional powers that are over and above those contained within the Act, and have they properly justified their position?
This may add further weight to your argument that the imposition of the financial penalty by the Strata Committee is harsh and oppressive.
https://www6.austlii.edu.au/cgi-bin/viewdoc/au/legis/nsw/consol_act/ssma2015242/s132.html