Common fences versus private fences Victoria

Can someone verify or advise differently the responsibility strata owners have in repairing or replacing fences in their Owners Corporation in Victoria.  Opinions differ by Consumer Affairs staff which is causing angst with some owners.  As there is no such OC Fencing Act due to such a variance in strata land and buildings the following has been suggested by some CA staff members as deemed as being the most logical and common sense principle if no separate internal by laws are in place.

If the fence is used strictly for the sole use of that unit then that unit is solely responsible for its upkeep or replacement.  But if the fence borders common property on one side and private property on the other side then the OC is responsible for 50% and the owner for the other 50%.  If the fence separates two units then both owners are up for 50%.