The local police officers are a good preventive measure, but CATSA and Transport Canada would be the ones that, if they had an international threat or they knew of some reported problem that was going to happen, would have the news and would pass the message down — okay, let's toughen things up, let's tighten things up.
L'utilisation des services d'agents de police municipaux constitue une mesure de prévention efficace, mais l'ACSTA et Transports Canada seraient les premiers informés d'une menace internationale ou de tout problème potentiel, et ce seraient eux qui demanderaient aux autres organismes de resserrer la surveillance.