(a) Only those poisonous or toxic materials that are required for the operation and maintenance of an establishment or processing plant, such as for the cleaning and sanitizing of equipment and utensils and the control of insects and rodents, shall be allowed in an establishment or processing plant.
(b) Chapter 9, Section 24(a) does not apply to packaged poisonous or toxic materials that are for retail sale.
010-9 Wyo. Code R. § 9-24