; and (F) extend the deadline specified by an agency for an assessment of a major rule or a high-impact rule under paragraph (1)(B)(iv) or paragraph (2)(C)(i)(I) for a period of not more than 90 days if the agency justifies why the agency is unable to complete the assessment by that deadline. (4) Rule of construction Nothing in this subsection shall be construed to affect— (A) the authority of an agency to assess or modify a major rule or a high-impact rule of the agency earlier than the end of the timeframe specified for the rule under paragraph (1)(B)(iv); or (B) any other provision of law that requires an agency to conduct retrospective reviews of rules issued by the agency. (5) Applicability (A) In general This subsection shall not apply to— (i) a major rule or a high-impact rule of an agency— (I) that the Administrator reviewed before the date of enactment of this subsection; (II) for which the agency is required to conduct a retrospective review under any other provision of law that meets or exceeds the requirements of this subsection, as determined by the Administrator; or (III) for which the authorizing statute is subject to periodic reauthorization by Congress not less frequently than once every 10 years; (ii) interpretative rules, general statements of policy, or rules of agency organization, procedure, or practice; (iii) routine and administrative rules