The Secretary shall adopt rules to determine conservation flow standards for snowmaking, to be used in relevant Agency of Natural Resources regulatory processes governing water withdrawals, diversions, impoundments, and the construction of appurtenant facilities, and to be used in developing positions to be asserted by the Agency in other State regulatory processes governing conservation flows for snowmaking. These rules shall not supersede water quality standards adopted by the Secretary pursuant to chapter 47 of this title. These rules shall achieve the purposes of this subchapter, and shall provide for the periodic review of any decision issued under the rules. All existing water withdrawals, diversions, and impoundments for snowmaking that are permitted at instream flows below the standards shall be reviewed by July 1, 2000. (Added 1995, No. 15, § 1; amended 2003, No. 115 (Adj. Sess.), § 21, eff. Jan. 31, 2005; 2011, No. 138 (Adj. Sess.), § 27, eff. May 14, 2012.)