(2) Any assignment of copyright, or any licence granting an interest in a copyright, may be executed, subscribed or acknowledged by the assignor, licensor or mortgagor, i
n any other foreign country before any notary public, commissioner or other official or the judge of any court of the foreign country, who is authorized to administer oaths or perform notarial acts in that foreig
n country and whose authority shall be proved by the certificate of a diplomatic or consular officer of Canada performing their functions
...[+++] in that foreign country.