726.39. The paid-up capital attributed to a corporation for a taxation year that ends in a calendar year is equal to(a) where the corporation is not associated with any other corporation in the taxation year, its paid-up capital determined as provided in section 771.2.1.9 either for its preceding taxation year or, if the corporation is in its first fiscal period, on the basis of its financial statements prepared at the beginning of that fiscal period in accordance with generally accepted accounting principles or, if such financial statements have not been prepared, or have not been prepared in accordance with generally accepted accounting principles, on the basis of such financial statements that would be prepared in accordance with generally accepted accounting principles; and
(b) where the corporation is associated with one or more other corporations in the taxation year, the aggregate of all amounts each of which is, for the corporation or any of the other corporations, the amount of its paid-up capital determined as provided in section 771.2.1.9 either for its last taxation year that ended in the preceding calendar year or, if such a corporation is in its first fiscal period, on the basis of its financial statements prepared at the beginning of that fiscal period in accordance with generally accepted accounting principles or, if such financial statements have not been prepared, or have not been prepared in accordance with generally accepted accounting principles, on the basis of such financial statements that would be prepared in accordance with generally accepted accounting principles.