26 U.S.C. § 269: Acquisitions made to evade or avoid income tax

any person or persons acquire, directly or indirectly, control of a corporation, or any corporation acquires, directly or indirectly, property of another corporation, not controlled, directly or indirectly, immediately before such acquisition, by such acquiring corporation or its stockholders, the basis of which property, in the hands of the acquiring corporation, is determined by reference to the basis in the hands of the transferor corporation, there is a qualified stock purchase by a corporation of another corporation, an election is not made under section 338 with respect to such purchase, the acquired corporation is liquidated pursuant to a plan of liquidation adopted not more than 2 years after the acquisition date, and the principal purpose for such liquidation is the evasion or avoidance of Federal income tax by securing the benefit of a deduction, credit, or other allowance which the acquiring corporation would not otherwise enjoy, For purposes of paragraph (1), the terms “qualified stock purchase” and “acquisition date” have the same respective meanings as when used in section 338. to allow as a deduction, credit, or allowance any part of any amount disallowed by such subsection, if he determines that such allowance will not result in the evasion or avoidance of Federal income tax for which the acquisition was made; or to distribute, apportion, or allocate gross income, and distribute, apportion, or allocate the deductions, credits, or allowances the benefit of which was sought to be secured, between or among the corporations, or properties, or parts thereof, involved, and to allow such deductions, credits, or allowances so distributed, apportioned, or allocated, but to give effect to such allowance only to such extent as he determines will not result in the evasion or avoidance of Federal income tax for which the acquisition was made; or to exercise his powers in part under paragraph (1) and in part under paragraph (2).