If there is no renovation by-law registered, then the ongoing maintenance and repairs remains with the OC.
True but I believe the OC can compel the new owner to either reinstate the common property or agree to a by-law transferring responsibility to the lot owner. E.g. non-approved air-con breaks down, the OC can say they won’t fix it and instead will remove it and reinstate the common property. The lot owner can then agree to a by-law meaning they fix it themselves or lose the air-con completely.