A request for extension of protection described in section 1141f(a) of this title shall be examined as an application for registration on the Principal Register under this chapter, and if on such examination it appears that the applicant is entitled to extension of protection under this subchapter, the Director shall cause the mark to be published in the Official Gazette of the United States Patent and Trademark Office.

Subject to the provisions of subsection (c), a request for extension of protection under this subchapter shall be subject to opposition under section 1063 of this title.

Extension of protection shall not be refused on the ground that the mark has not been used in commerce.

Extension of protection shall be refused to any mark not registrable on the Principal Register.

If the Director has sent a notification of the possibility of opposition under paragraph (1)(C), the Director shall, if applicable, transmit to the International Bureau a notification of refusal on the basis of the opposition, together with a statement of all the grounds for the opposition, within 7 months after the beginning of the opposition period or within 1 mon

th after the end of the opposition period, whichever is earlier.

If a notification of refusal of a request for extension of protection is transmitted under paragraph (1) or (2), no grounds for refusal of such request other than those set forth in such notification may be transmitted to the International Bureau by the Director after the expiration of the time periods set forth in paragraph (1) or (2), as the case may be.

If a notification specified in paragraph (1) or (2) is not sent to the International Bureau within the time period set forth in such paragraph, with respect to a request for extension of protection, the request for extension of protection shall not be refused and the Director shall issue a certificate of extension of protection pursuant to the request.