Got to agree with Jimmy. Councils (QLD does and I suspect NSW would as well) when they authorize Strata developments they specify how many visitor parking bays are required for the said development. Ruling in QLD have thrown out requests to use visitor parking for anything other than parking for visitors. Even a 100% vote by owners doesn’t change the fact that bylaws cannot conflict with council laws, state laws or commonwealth laws and if they do bylaws loose.
You need to research if same requirement for visitor parking is applicable in NSW if it is EC don’t have a leg to stand on. Being on the EC entitles the person to no special privileges.