Colosus01 – the expansion of what amounts to be a shared driveway to the benefit of only one Owner is a situation where a SBL or a Licence would be necessary, but as Jimmy said, whether after (perhaps) consenting to that at the General Meeting your O/C also resolves to grant a Licence or Register a SBL would depend upon the specific circumstances – such as the layout of the driveway, whether the O/C wants to be paid for the area covered by the expansion (1), and whether it wants to shift the responsibility for maintaining and repairing that area to the Owner (2) – because a Licence is the means to achieve (1) and a SBL is the only means both (1) and (2).
Given the past decisions of your Strata Manager (i.e. in your other posts about the TV Antenna and the Insurance Claim) it’s clear she’s inclined to push for the easiest short-term as opposed to the best long-term solutions, so consider that both a Licence to use Common Property a SBL granting the exclusive use of Common Property can be made specific to an area; in your O/C’s case only that part of the shared driveway that benefits the Owner who seeks to expand it.