Colosus01 – may I just add that there would need to be a specific Special By Law registered for your Plan if the 3m restriction that you mention is truly a Strata requirement (as opposed to one by Council).
“Struggs” is right about a making formal submission, especially as it sounds to me like you have all the info. anyway, because at least then the O/C's decision and the reasons for it, also has to be in writing.
That way, if you choose, you'll be in a position to do something about any ad-hoc and/or spurious decisions via the Strata Regulator in your State; in NSW – https://www.cttt.nsw.gov.au/Divisions/Strata_and_community_schemes.html