Public safety is a very broad field, but I would like to move on to another area, namely civil security.
When natural disasters occur and broken equipment must be repaired or replaced, officials on both sides of the border exchange procedures. At least that's what happens in Eastern Canada because I have taken part in some of these exchanges. This is especially true when some areas are without power following a storm or hurricane. The state or province in which the outage occurred requires assistance in order to restore the power quickly. This happens quite often.
A number of agreements have been worked out to avoid having to check workers' qualifications, for example, in such instances. I would imagine some similar arrangements apply when we send our tanker airplanes off to fight fires in the U.S., and so forth.
In such cases do people need a passport to travel? Are they asked to produce a passport? For example, if Hydro-Québec confirms that a natural disaster has cut power to a large portion of the state of Maine, we can quickly dispatch some linemen to provide assistance. In fact, Hydro-Québec employees must have obtained their passports in advance in case they are called abroad.
How do such agreements work?