Minimum operating crew

An aircraft shall carry on all flights an operating crew adequate in number and description to ensure the safety of the aircraft and of at least the number and description specified as the minimum operating crew in the certificate of airworthiness relating to the aircraft in force under the Order or, if no such certificate is in force, in the certificate of airworthiness last in force under the Order relating to the aircraft, provided that if no certificate of airworthiness relating to the aircraft is or has been in force under the Order and the aircraft is an aircraft conforming with a prototype or prototype (modified) aircraft in respect of which a certificate of airworthiness has been issued under the Order, the operating crew to be carried in the aircraft shall be of at least the number and description specified as the minimum operating crew in that