I don't want what I said misunderstood. It was an insurrection, but the legal mechanism to bring troops into play for Operation SALON was as a result of a formal written request for Aid of the Civil Power by the Province of Quebec to the Federal government under the NDA.
Insurrection was a part of the War Measures Act. By then, the War Measures Act used by Trudeau in 1970 had been replaced by the Emergencies Act. Under Part II of that Act the the Federal government can (without a provincial request) declare a Public Order Emergency - it doesn't directly mention insurrection. That's what was used in Ottawa in 2022. It is initiated by the Feds and gives them various powers to act.
Note that the term "insurrection" is also part of the definition of an "emergency" under the NDA (along with riot, invasion, armed conflict whether real or apprehended.) Under the NDA, a situation of an emergency allows the government to do specific things such as placing the CAF or a part of it on active service (NDA 31(1)(a); put a pause on releases (NDA 30)
Op Salon however was a standard Aid of the Civil Power request.