100.—(1) All certificates of competency shall be made in duplicate, one part to be delivered to the person entitled to the certificate, and one to be preserved.

(2) Such last-mentioned part of the certificate shall be preserved, and a record of certificates of competency and the suspending, cancelling, or altering of the certificates and any other matter affecting them shall be kept, in such manner as the Board of Trade direct, by the Registrar-General of Shipping and Seamen or by such other person as the Board of Trade direct.

(3) Any such certificate and any record under this section shall be admissible in evidence in manner provided by this Act.