21.5.4. The provisions referred to in paragraph c of section 21.5 are, in the case of a share issued between 12 November 1981 and 1 January 1983 otherwise than pursuant to an agreement referred to in section 21.5.3 or a share issued after 31 December 1982, one of the following:(a) the owner thereof may cause the share to be acquired, cancelled or redeemed, 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 or partnership is or may be required to acquire, cancel or redeem the share, in whole or in part, otherwise than by reason only of a right to convert or exchange the share, or to reduce its paid-up capital;
(c) a person or partnership 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 holder thereof or any person related thereto, with respect to the share.