I checked the Alberta Queen's Printer website -
http://www.qp.gov.ab.ca/ - and found no Acts or Regulations (aka laws) that make any reference to scanners. There's nothing in the Traffic Safety Act (replacement for the Highway Traffic Act/Motor Vehicle Administration Act) that I can see, and no other Acts/Regulations that I can locate that one would reasonably expect such stuff to be contained in.
I also searched
http://laws.justice.gc.ca - the Government of Canada equivalent of the Queen's Printer - and scoured the
Radiocommunications Act, and found nothing except the usual "no person shall intercept and make use of, or intercept and divulge, any radiocommunication, except as permitted by the originator of the communication or the person intended by the originator of the communication to receive it."
Granted, I've only done a quickie search. However, I found few other laws, statutes, or other documents which would restrict or regulate use of scanners or other radio receivers, and I've done some serious looking in the past, regarding the "digital scanner" junk.