Would sub-letting one room in a property for “sharing” be more likely to come under the definition of boarding or lodging, which is exempt from most RTA requirements?
The definitions are a bit fuzzy but for the purposes of this discussion, I would say if your name is on a lease agreement – even as a sub-tenant – then it should be on the strata roll too.
There are definitions of boarders and lodgers in this factsheet which are quite helpful although none of it directly addresses strata schemes.