registered design; or (b) for registration in respect of the same or one or more other articles, of a design consisting of the registered design with modifications or variations not sufficient to alter the character or substantially to affect the identity thereof; the application shall not be refused and the registration made on that application shall not be invalidated by reason only of the previous registration or publication of the registered design: Provided that the period of copyright in a design registered by virtue of this section shall not extend beyond the expiration of the original and any extended period of copyright in the original registered design. (2) Where any person makes an application for the registration of a design in respect of any article and either(a) that design has been previously registered by another person in respect of some other article; or (b) the design to which the application relates consists of a design previously registered by another person in respect of the same or some other article with modifications or variations not sufficient to alter the character or substantially to affect the identity thereof; then, if at any time while the application is pending the applicant becomes the registered proprietor of the design previously registered, the provisions of subsection (1) shall apply as if at the time of making the application the applicant had been the registered proprietor of that design. 11. (1) In this section, "competent authority" means the President or the Provisions for Minister or Junior Minister, if any, to whom the President may assign secrecy of special responsibilities for defence matters. certain designs (2) Where an application for the registration of a design has been made, and it appears to the Registrar that the design is one of a class notified to him by the competent authority as relevant for defence purposes, he may give directions for prohibiting or restricting the publication of information with respect to the design, or the communication of such information to any person or class of persons specified in the directions.