In Canada everything attached to the aircraft must be approved
Part V - Airworthiness Manual Chapter 551 - Aircraft Equipment and Installation - Transport Canada
Interpretation Provision for Part V Standards
In these Standards:
- (a) The passages giving the Minister power to determine, approve or authorise something without stating criteria for the use of such power are to be interpreted as requiring that the power be used in consideration of two factors only:
the airworthiness of the aircraft that is the subject of the determination, approval or authorisation, or on which an aeronautical product that is the subject of the determination, approval or authorisation is to be installed, and the aircraft's level of safety;
- (b) The word "approved", when used without any indication of a method of approval, is to be interpreted as referring to an approval granted under the Aeronautics Act.