50-30-201. Hazardous substance defined. (1) "Hazardous substance" means:

(a) a substance or mixture of substances which:

(i) is toxic;

(ii) is corrosive;

(iii) is an irritant;

(iv) is a strong sensitizer;

(v) is flammable or combustible; or

(vi) generates pressure through decomposition, heat, or other means if the substance or mixture of substances may cause substantial personal injury or substantial illness during or as a proximate result of any customary or reasonably foreseeable handling or use, including reasonably foreseeable ingestion by children;

(b) substances which the department by rule finds under 50-30-215 meet the requirements of subsection (1)(a) of this section;

(c) a radioactive substance if, with respect to the substance as used in a particular class of article or as packaged, the department determines by rule that the substance is sufficiently hazardous to require labeling in accordance with this chapter in order to protect the public health; or

(d) a toy or other article intended for use by children which presents an electrical, mechanical, or thermal hazard as determined by the department by rule in accordance with 50-30-220.

(2) (a) The term "hazardous substance" does not apply to pesticides subject to the federal Pesticide Environmental Control Act or the Montana Pesticides Act, to foods, drugs, and cosmetics subject to the Montana Food, Drug, and Cosmetic Act, or to substances intended for use as fuels when stored in containers and used in the heating, cooking, or refrigeration system of a house.

(b) The term applies, however, to an article which is not itself a pesticide within the meaning of the federal Pesticide Environmental Control Act or the Montana Pesticide Act but which is a hazardous substance within the meaning of subsection (1) of this section by reason of bearing or containing a pesticide.

(c) The term also applies to pesticides whenever human health is directly affected from the use or misuse of pesticides requiring an accident investigation for the purpose of preparing recommendations to federal or state pesticide control agencies.

(3) The term "hazardous substance" does not include source material, special nuclear material, or byproduct material as defined in the Atomic Energy Act of 1954, as amended, and rules issued pursuant thereto by the atomic energy commission.