26 U.S. Code § 6251 - Administrative adjustment requests
If a partnership files an administrative adjustment request under subsection (a), the Secretary may allow any part of the requested adjustments.
If the period described in section 6248(a) is extended pursuant to an agreement under section 6248(b), the period prescribed by subsection (a)(1) shall not expire before the date 6 months after the expiration of the extension under section 6248(b).
Pub. L. 114–74, title XI, § 1101(b)(2), (g), Nov. 2, 2015, 129 Stat. 625, 638, provided that, applicable to returns filed for partnership taxable years beginning after Dec. 31, 2017, with certain exceptions, this section is repealed.