Liability insurance
Two separate questions live here, and the second is the one that catches people. First: does your regulator require professional liability insurance at all, and at what limits? That answer is not uniform, even between colleges in the same province.
Second, and less documented anywhere: where does your coverage actually apply? Regulator by-laws are frequently silent on territory, while the insurance programs practitioners actually buy differ sharply — some follow you worldwide, some stop at the Canadian border, and some address travelling with your existing clients without ever addressing clients based elsewhere. The matrix separates what the regulator requires from what a policy is documented to cover, because conflating them is how a gap goes unnoticed.