38 C.F.R. § 26.30
(b) Extraordinary circumstances review. Examples of extraordinary circumstances include whether the action:
(d) VA review of list of categorical exclusions.
(2) VA may also consider revisions to the CATEX list when substantial changes or additions to VA plans, programs, or activities occur such that the current CATEX list may be inadequate or inaccurate given the current scope of VA activities. Potential triggers for revising the VA CATEX list may include:
(3) To establish or revise a CATEX, VA will determine that the category of actions normally does not significantly affect the quality of the human environment. In making this determination, VA will: