1. (1) An application for revision to a permit must be submitted for departmental review:

   1. (a) for any proposed change(s) in the operation as described in the original permit and subsequent revisions thereof; or
   2. (b) when required under ARM 17.24.414.
2. (2) The operator may not implement the revision before obtaining the department's approval.

3. (3) An application for major revision:

   1. (a) must comply with subchapter 3, as appropriate;
   2. (b) is subject to the public notice and participation provisions of ARM 17.24.401 through 17.24.405; and
   3. (c) must include submittal of a new or updated probable hydrologic consequence determination, if determined necessary by the department for adequate permit review.
4. (4) If impacts change, the department shall update the cumulative hydrologic impact assessment.

Authorizing statute(s): 82-4-205, MCA

Implementing statute(s): 82-4-221, MCA

History: NEW, 1980 MAR p. 725, Eff. 4/1/80; AMD, 1989 MAR p. 30, Eff. 1/13/89; TRANS, from DSL, 1996 MAR p. 2852; AMD, 1999 MAR p. 811, Eff. 4/23/99; AMD, 2024 MAR p. 255, Eff. 2/10/24.