Am I required to have my Radiotelephone Operator's Restricted Certificate (Aeronautical) on-board the aircraft with me?
There is no requirement to have the certificate with you on board during flight.


  The holder of a radio authorization shall, at the request of an inspector appointed pursuant to the Act, show the radio authorization or a copy thereof to the inspector within 48 hours after the request.   


Source:Radiocommunication Regulations, s 38