726.7.0.1. Where the second amount in dollars referred to in subparagraph a of the first paragraph of section 726.7.1 is, with reference to section 693.5, greater than $500,000 for a taxation year, the following rules apply:(a) the amount of $500,000 in the formula in subparagraph a of the first paragraph of section 726.7 is to be replaced for the year by that greater amount; and
(b) section 726.19.1 is to be read for the year without reference to its third paragraph.