; (3) such claim is filed after the issuance of a record of decision or other final agency action with respect to the relevant proposed agency action; and (4) such claim does not challenge the establishment of a categorical exclusion under section 102. (b) Supplemental environmental impact statement (1) Separate final agency action The issuance of a supplemental environmental impact statement shall be considered a final agency action for the purposes of chapter 5 of title 5, United States Code, separate from the issuance of any previous environmental impact statement with respect to the same proposed agency action. (2) Deadline for filing a claim A claim seeking judicial review of a supplemental environmental review issued under section 102(2)(C) shall be barred unless— (A) such claim is filed within 120 days of the date on which such supplemental environmental impact statement is issued