If things are proving too hard in Qld or anywhere else, I suggest looking at and lobbying for what the ACT has done in this area to streamline sustainability infrastructure on common property. In particular our Act now deals with things like approving conduits traversing common property as part of a sustainability proposal.
See https://www.justice.act.gov.au/review/view/17 and pick the factsheet on sustainability etc.
Cheers,
Peter from Canberra.