21.9.1. Subject to section 21.9.2, the rule provided by section 21.8 also applies, with the necessary modifications, in the following cases:(a) where the terms or conditions of a share issued pursuant to an agreement referred to in paragraph a of section 21.6 or those of any agreement relating to such a share have been changed;
(b) where the owner of a share may, alone or together with one or more taxpayers, require the acquisition, cancellation, conversion or redemption of the share or the reduction of its paid-up capitali. after 16 November 1978 under the terms or conditions of a share issued before 17 November 1978 and not listed on 16 November 1978 on a Canadian stock exchange that was prescribed on that date, of a share issued pursuant to an agreement referred to in paragraph a of section 21.6, of any agreement between the issuer and the owner of such a share, or any agreement relating to such a share made after 23 October 1979;
ii. after 12 November 1981 in the case of a share issued between 16 November 1978 and 13 November 1981, except a share described in section 21.6.1 or a share listed on 13 November 1981 on a Canadian stock exchange that was prescribed on that date, or a share issued between 12 November 1981 and 1 January 1983 pursuant to an agreement referred to in section 21.5.3;
(c) where a specified financial institution or a partnership or trust of which a specified financial institution or a person related thereto is a member or a beneficiary acquires,i. between 23 October 1979 and 13 November 1981, from a person, a share issued before 17 November 1978 or a share issued pursuant to an agreement referred to in paragraph a of section 21.6;
ii. after 12 November 1981, from a person or a partnership, a share issued before 13 November 1981 or a share pursuant to an agreement referred to in section 21.5.3.