Canadian Aviation Regulations

511.14 The holder of a type certificate who proposes to change the type design of an aeronautical product shall assign a new designation to the aeronautical product and submit an application for a new type certificate if the Minister determines that the scope and nature of the proposed change in design, configuration, power, power limitations (engines) or weight are so extensive that a substantially complete investigation is necessary to determine compliance with the applicable standards of airworthiness.