(b) in any other case, nil, unlessi. any part of the interest was acquired by the taxpayer from a person who was the beneficiary in respect of the interest immediately before its acquisition by the taxpayer, or
ii. the cost of any part of the interest would be determined not to be nil under sections 242 to 247.1, as they read before 1 January 1993, subparagraph c of the second paragraph of section 736 and the third paragraph of that section, paragraph c of section 785.1 or subparagraph c of the first paragraph of section 785.2.