I would think cases like this the Owners Corp would approach a strata lawyer or strata manager and ask them to prepare a by-law for which the OC would pay. The renovators would then be invited to use that by-law at, say, 25 percent of its cost, or present a suitable by-law that they had paid to have drafted themselves.
At the end of the day, everybody has a properly constituted by-law – passed by separate special resolutions – that has cost them a fraction of the total and cost the OC nothing (if the committee has done their sums right).
This would have to be better that the scenario presented the last time I was on radio (see my podcasts on the front page of this website) where a management company was gouging money for writing, reviewing and passing by-laws for every little thing in their building.