Sec. 3. (a) A person may not use, sell, or otherwise dispose of any detergent containing phosphorus, except:
(1) for those amounts not exceeding one-half percent (0.5%) by weight incidental to manufacturing; and
(2) in accordance with rules adopted under IC 4-22-2 by the board;
in Indiana or into the boundary waters of Indiana from a source within Indiana.
(b) The concentration of phosphorus shall be determined by the applicable method prescribed by the American Society for Testing and Materials.