Whilst the strata act describes who is responsible for a fence, the law governing fences is the dividing fences act ( in NSW).
The act only says a suitable fence needs to be erected and it needs to be agreed by the owners. So if the fence is between two lots, then these owners need to agree on a fence and split the cost.
i don’t see anywhere in the strata act that allows the owners corporation to dictate the type of fence between lots .
if it’s a coo on property fence, the owners corporation has a say as to the type of fence
if it’s between a lot and common property, then the lot owner and the owners corporation need to be in agreement.
the dividing fences act is also very specific in how to remedy disputes.
Robert