(1) Not later than October 1, 1991, the Commission on Environmental Quality shall promulgate rules and regulations establishing standards for the production of compost. The commission may modify, repeal, make exceptions to and grant exceptions and variances from such rules and regulations. Such rules and regulations shall include, but not be limited to, the following:

(a) Requirements necessary to produce hygienically safe compost products for varying applications.

(b) A classification scheme for compost based on the types of waste composted, including at least one (1) type containing only yard trash; the maturity of the compost, including at least three (3) degrees of decomposition for fresh, semimature and mature; and the levels of organic and inorganic constituents in the compost. This scheme shall address:

(i) Methods for measurement of the compost maturity;

(ii) Particle sizes;

(iii) Moisture content; and

(iv) Average levels of organic and inorganic constituents, including heavy metals, for such classes of compost as the Commission on Environmental Quality establishes, and the analytical methods to determine those levels.

(2) Not later than January 1, 1992, the Commission on Environmental Quality shall promulgate rules and regulations prescribing the allowable uses and application rates of compost based, at a minimum, on the following criteria:

(a) The total quantity of organic and inorganic constituents, including heavy metals, allowed to be applied through the addition of compost to the soil per acre per year.

(b) The allowable uses of compost based on maturity and type of compost.