59. In sections 263 and 485 of the Taxation Act the principal amount of any debt or other obligation outstanding on January 1972 is deemed to be the lesser of the principal amount, otherwise determined for the purposes of this act, and its fair market value on valuation day.
In its application to any such debt or other obligation the expression “issue price”, in paragraph a of section 263 of the said Act, means “the lesser of the principal amount and the issue price”.