21.5.1. For the purposes of paragraph b of section 21.5, the owner of the share must be(a) a corporation referred to in any of paragraphs a to e.1 of the definition of “specified financial institution” in section 1;
(b) a corporation that is controlled by one or more corporations referred to in paragraph a,
(c) a corporation that acquired the share after 11 December 1979 and is related to a corporation referred to in paragraph a or b, or
(d) a partnership or trust of which a corporation referred to in paragraph a or b or a person related thereto is a member or a beneficiary.