Authorization to Carry
An Authorization to Carry is a permit issued by the government of Canada under the Firearms Act. An ATC allows an individual to lawfully possess a restricted, or a specific class of, prohibited firearm that is loaded or possessed with readily accessible ammunition. Under this permit, the approved firearm may be carried on the permit holder's person, in a holster. The issuing CFO may specify on the ATC that concealing the firearm is permitted, and may impose any other conditions deemed appropriate; for example, an ATC issued for armoured car work requires a uniform be worn while armed.
This permit is less common than the Authorization to Transport permit which allows secured and trigger locked transport of Restricted and Prohibited class firearms in an unloaded state.