The problem with putting your head in the sand is that as soon as something goes wrong with the skylight, the owner will come to the Owners Corporation asking for them to fix it, as it’s on common property. At that time you could play nice and shrug and fix it, or play “legal” and say “well, the OC doesn’t want the continuing expense of a skylight so we are going to board it over.”
Either way ugliness ensues. As long as the OC understands their liabilities in the circumstances, and the owner the risk, that’s fine. But if you want to avoid potential problems, get bylaws registered. Although a strata lawyer will probably tell you differently, there’s nothing too complicated about them… is there an example of an exclusive use bylaw already in the scheme that you could crib? Does your Strata Manager have a pro forma one you could use? The Land Titles Office will assist with registration procedure. Knock one up and no one can say then that it’s too hard.