The chair has no executive powers, as ScotlandX and Col Schultz has said, but what power do they wield in the community. If their word is effectively law, then quoting chapter and verse of strata law will make no difference. E.g. when your motion goes to the AGM to replace the front door, will it even get on the agenda.
Sure, strata law is on your side – but how much hassle and grief will you face in having that recognised. Just make sure you have some reliable allies in the block before you make your move.