You might want to take a look at Section 30 (1) (a) of the Emergencies Act which reads as
Orders and regulations
30 (1) While a declaration of an international emergency is in effect, the Governor in Council may make such orders or regulations with respect to the following matters as the Governor in Council believes, on reasonable grounds, are necessary for dealing with the emergency:
(a) the control or regulation of any specified industry or service, including the use of equipment, facilities and inventory;
and then get back to me and try and convince me that "banking" is neither an "industry" nor a "service" as well as showing me how the Governor in Council is required to have a court of law make the determination as to what is "reasonable".