; and (2) the construction of a temporary road that is not longer than 1 mile to carry out that commercial thinning. (b) Acreage limitations A forest management activity covered by the categorical exclusion granted by subsection (a) may not contain harvest units exceeding a total of 6,000 acres. (c) Extraordinary circumstances The Secretary may apply the extraordinary circumstances procedures under section 220.6 of title 36, Code of Federal Regulations (or a successor regulation), in determining whether to use a categorical exclusion under subsection (a). (d) Consistency In carrying out forest management activities using the categorical exclusions under subsection (a), the Secretary shall ensure that the forest management activities are consistent with the applicable forest plans. (e) Cumulative impacts The Secretary shall not be required to conduct a cumulative impact analysis in an environmental document prepared under the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.) for a forest management activity carried out using a categorical exclusion made available to the Secretary under subsection (a) or any other provision of law (including regulations). 336. Expansion of categorical exclusion for insect and disease infestation (a) Permanent authority Section 602(f) of the Healthy Forests Restoration Act of 2003 ( 16 U.S.C. 6591a(f) ) is amended by striking each of fiscal years 2014 through 2024. and inserting each fiscal year. . (b) Administrative review Section 603 of the Healthy Forests Restoration Act of 2003 ( 16 U.S.C. 6591b ) is amended— (1) in subsection (a), in the matter preceding paragraph (1), by striking described in subsection (b) ; (2) by striking subsection (b); (3) by redesignating subsections (c) through (g) as subsections (b) through (f), respectively; and (4) in subsection (b) (as so redesignated)— (A) in paragraph (1), by striking 3000 and inserting 6,000