Disc income combining.

In the case of a parent corporation, its DISC or affiliate, the net income of a DISC derived from business transacted with its parent shall be combined with the income of the parent corporation and the net income of a DISC derived from business transacted with the parent’s affiliated corporation shall be combined with the net income of the affiliated corporation to determine the amount of income subject to taxation under this chapter for the DISC, the parent corporation or the affiliate of the parent corporation as separate taxable entities. The net income of the parent corporation shall not include dividends received from the DISC paid from income previously combined for taxation under this subsection. “DISC” (domestic international sales corporation) has the meaning specified in section 992 of the internal revenue code as amended to December 31, 1979. For purposes of this subsection, a corporation is affiliated if at least 50 percent of its total combined voting stock is owned directly or indirectly by its parent corporation.