I don’t give up easily here is a quote from a ruling in QLD which quotes the relevant bylaw and this has the same the same proviso.
A proprietor or occupier of a lot shall not effect any alteration or addition to the internal walls or structural feature of a lot without the prior approval in writing of the Body Corporate provided that such approval shall not be unreasonably withheld.
https://www.austlii.edu.au/cgi-bin/sinodisp/au/cases/qld/QBCCMCmr/2008/71.html
I know it’s QLD and it’s totally difference rules but we don’t know what adammark actual bylaws say in regard to this issue.
Also QLD has 8,000 online ruling whereas NSW has 1,000. I find reading the ruling gives a good understanding of how adjudicators make their decisions.