(a) Pursuant to the authority contained in article 6 of the Public Health Law, the Water Pollution Control Board, having made proper studies and having held a public hearing on due notice with reference thereto, adopts and assigns the following classifications and standards of quality and purity to the various waters specifically designated and described below and subject to the definitions and conditions as stated herein.

(b) Pursuant to article 12 of the Public Health Law, the Water Resources Commission, after proper study and following a public hearing conducted by the former Water Pollution Control Board, held on due notice, adopts amendments to the classifications and standards of quality and purity assigned to fresh surface waters of the Mill Creek drainage basin to change item numbers 3, 5, 6, 8, 10, 11, 12, and 14 in table I, section 845.5, infra, as hereinafter defined. This adoption and assignment of standards of quality and purity to the designated waters, as amended, shall be effective May 1, 1963.