21.5.3. The provisions referred to in paragraph c of section 21.5 are, in the case of a share issued between 23 October 1979 and 13 November 1981 or a share issued between 12 November 1981 and 1 January 1983 pursuant to an agreement in writing to that effect entered into before 13 November 1981, the following:(a) the owner thereof may, within 10 years after the date of issue, cause the share to be redeemed, acquired or cancelled, otherwise than by reason only of a right to convert or exchange the share, or cause its paid-up capital to be reduced,
(b) a person is or may be required to redeem, acquire or cancel, in whole or in part, the share or to reduce its paid-up capital, within 10 years after the date of issue,i. otherwise than pursuant to a requirement of the issuing corporation to redeem, acquire or cancel annually not more than 5% of the issued and fully paid shares of that class and, where the requirement was agreed to after 21 April 1980, it provides that such redemption, acquisition or cancellation be in proportion to the number of shares of the class or of the series of the class registered in the name of each shareholder, or
ii. unless the requirement to redeem, acquire or cancel the share arises by reason only of right to convert or exchange the share, or
(c) a person provides or may be required to provide a guarantee or similar indemnity or covenant, including the lending of funds to or the placing of amounts on deposit with, or on behalf of, the owner thereof or any person related thereto, with respect to the share.