Unless you already have them, download your strata plan and registered by-laws from the LPI website (fees are payable). A careful study of them might save you going wrong somewhere.
Also, where you say the OC knew of and gave permission for your barbecue, note that the OC is not quite the same thing as a roomful of 12 owners and nor is it the committee. Your dab-handed partner should keep that in mind when reading.