010-28 Wyo. Code R. § 28-11
(a) When it is determined that standards for the certification of private applicators, or commercial applicators must be more stringent than the standards in Section 5 or Section 9 and additional special identification is necessary for an individual using a highly toxic pesticide or applying a pesticide which has been demonstrated to be particularly hazardous to the environment, the standards for the applicator shall include, in addition to their category standards, an especially high degree of knowledge concerning the compound's action, its limitations and the areas in which it is to be applied.
(b) When it is determined by the Board of Certification that unreasonable adverse effects on the environment may reasonably occur, and following a hearing pursuant to the Wyoming Administrative Procedures Act, the Board may restrict the time, place, manner, materials, amounts and concentrations used in connection with the application of a pesticide, or may prohibit use of pesticides in designated areas during specified periods of time. The restrictions and/or prohibitions shall encompass all reasonable factors which the Board deems necessary.
010-28 Wyo. Code R. § 28-11