If nobody can see a problem with it, I can’t see that you need a lawyer. Send a draft to all owners and ask for comment. If none of them can see a problem, then it is very likely that there is no problem and it will pass at a general meeting. It’s probably not rocket science and sounds like it is well considered having reference to DA conditions etc.
The worst that could happen is that you try to enforce the new rule and the validity of the rule is challenged and it turns out to have some flaw. If that happens, you amend the rule to fix the flaw.