(a) The commission, when it determines that the control of air pollution is necessary, shall adopt rules concerning the control of emissions of particulate matter from plants at which grain, seed, legumes, or vegetable fibers are handled, loaded, unloaded, dried, manufactured, or processed according to a formula derived from the process weight of the materials entering the process.
(b) A person affected by a rule adopted under this section may use:
(1) the process weight method to control and measure the emissions from the plant; or
(2) any other method selected by that person that the commission or the executive director, if authorized by the commission, finds will provide adequate emission control efficiency and measurement.