Kiwipaul is correct but I would qualify one thing. The “Who’s Responsible” publication put out by the Institute of Strata Title Management provides that if the opening mechanism was installed after registration by the owner the opener is Owner responsibility. I copy from clause 15 page 8:
Garage Doors: If they were there on the registration of the strata plan, then they are the responsibility of the owners corporation (The OFT takes the view that garage controller is classified as the lock and door closer for the garage door albeit it being electric. Therefore as with the main lock and door closer to a unit’s entrance door being OC responsibility, so is the controller). However, if they were installed after by the owner, then they are the owner’s responsibility.
littlevoice, on ‘where do I stand’? my view is the OC is correct (technically anyway).