* Where one corporation owns more than 50% of another corporation; or
* If ownership by one corporation of another is 50% or less, then the question is whether the first corporation has effective control of the second. If the first corporation does not have effective control of the second, then dividends paid by the second corporation to the first is non-business income. For example, if the first corporation owns 40% of the second corporation, but the remaining 60% is owned by one entity unrelated to the first corporation, then the first corporation does not have effective control. But, if the first corporation owns 40% of the second corporation, and the remaining 60% is owned by the thousands of unrelated shareholders, each with a small percentage, then, in that circumstance, the first corporation would have effective control. If a corporation is controlled or effectively controlled, then the dividends may be business income, depending upon whether this corporation is also domestic and unitary.
35 Miss. Code. R. § 3-08-06-302.01