The certification issue highlights a tough spot for Canadian regulators. The Standing Committee on Transport has looked at 'harmonization' (making our rules match the US) for years. Usually it works fine. But when the FAA grants an exemption (a pass on a safety rule), Canada does not have to agree. If the US bends its own rules for Gulfstream, it forces Ottawa to choose between safety and trade. It turns a boring technical review into a major political fight.