under section 6108(d) and, if so, whether the Secretary determined such information to be statistically valid and based on sound statistical methodology. . (C) Conforming amendment Section 7803(c)(2)(B)(iii) is amended by adding at the end the following: The preceding sentence shall not apply with respect to statistical information provided to the Secretary for review, or received from the Secretary, under section 6108(d). . (c) Salary of National Taxpayer Advocate Section 7803(c)(1)(B)(i) is amended by striking , or, if the Secretary of the Treasury so determines, at a rate fixed under section 9503 of such title . (d) Effective date (1) In general Except as otherwise provided in this subsection, the amendments made by this section shall take effect on the date of the enactment of this Act. (2) Salary of National Taxpayer Advocate The amendment made by subsection (c) shall apply to compensation paid to individuals appointed as the National Taxpayer Advocate after the date of the enactment of this Act. 1302. Modernization of Internal Revenue Service organizational structure (a) In general Not later than September 30, 2020, the Commissioner of the Internal Revenue Service shall submit to Congress a comprehensive written plan to redesign the organization of the Internal Revenue Service. Such plan shall— (1) ensure the successful implementation of the priorities specified by Congress in this Act