Except in the case of a publicly offered regulated investment company (as defined in section
67
(c)(2)(B)), the amount of any distribution shall not be considered as a dividend for purposes of computing the dividends paid deduction, unless such distribution is pro rata, with no preference to any share of stock as compared with other shares of the same class, and with no preference to one class of stock as compared with another class except to the extent that the former is entitled (without reference to waivers of their rights by shareholders) to such preference. In the case of a distribution by a regulated investment company (other than a publicly offered regulated investment company (as so defined)) to a shareholder who made an initial investment of at least $10,000,000 in such company, such distribution shall not be treated as not being pro rata or as being preferential solely by reason of an increase in the distribution by reason of reductions in administrative expenses of the company.