10. (1) A declaration of alienage in such manner as may be prescribed by rules made under this Act may be made,- (a) within one year of his attaining majority, by any child who has acquired any of the rights, privileges or capacities of naturalization under sub-section (2)of section 5, or sub-section (2) of section 7; or (b) within six months from the date of the revocation of a certificate under section 8, or of the death of, or of the dissolution of her marriage with, the holder of any such certificate as is therein referred to, by the wife of the person whose certificate has been revoked, or who has died, or whose marriage to her has been dissolved, as the case may be. (2) Where a declaration of alienage has been made in the manner aforesaid, the person making the same, and the wife of any such person, and any children of any such person who are minors and are not by birth citizens of Bangladesh, shall cease to be deemed to be citizens of Bangladesh: Provided that the wife of any such person shall not cease to be deemed to be a citizen of Bangladesh under this sub-section, unless by reason of the acquisition by her husband of a new nationality she has also acquired that nationality.