Section 25. Seal and Its Use. —

All aeronautical engineers shall obtain official seal of a design prescribed by the Board, bearing the registrant's name, the number of his registration certificate, and the words; "Aeronautical Engineer." Plans, specifications, reports and such other professional documents prepared by or executed under the immediate supervision of, and issued by an aeronautical engineer shall be stamped on every sheet thereof with the official seal when filed with government authorities, or when submitted or used professionally during the life of the registrant's certificate.

It shall be unlawful for anyone to affix his official seal on any document after his certificate of registration has expired or has been revoked or suspended, unless said certificate shall have been renewed, reissued, or reinstated.