(1) An application for revision to a permit must be submitted for departmental review:
(a) for any proposed change(s) in the operation as described in the original permit and subsequent revisions thereof; or
(b) when required under ARM 17.24.414.
(2) The operator may not implement the revision before obtaining the department's approval.
(3) An application for major revision:
(a) must comply with subchapter 3, as appropriate;
(b) is subject to the public notice and participation provisions of ARM 17.24.401 through 17.24.405; and
(c) must include submittal of a new or updated probable hydrologic consequence determination, if determined necessary by the department for adequate permit review.
(4) If impacts change, the department shall update the cumulative hydrologic impact assessment.