; relating to regulatory planning and review), or any successor thereto. (d) Rule of construction Nothing in this section may be construed to require the head of an agency to respond to any recommendation submitted under subsection (b)(4) and any such recommendation may not be cited in a challenge to a final rule. . (b) Technical and conforming amendment The table of sections for chapter 6 of title 5, United States Code, is amended by adding after the item related to section 601 the following new item: 601A. Regulatory early notice. . (c) Effective date Not later than 180 days after the date of the enactment of this Act, the head of each agency shall establish the regulatory early notice webpage of the agency required pursuant to section 601A of title 5, United States Code, as added by subsection (b). Each agency webpage shall contain regulatory early notices for every agency rulemaking for which the Office of Management and Budget assigned a regulation identifier number after the date of the enactment of this Act. 4. Government accountability office reporting