(a) Receptacles and waste handling units for refuse, recyclables, and returnables used with materials containing food residue and used outside the establishment or processing plant shall be designed and constructed to have tight-fitting lids, doors, or covers.
(b) Receptacles and waste handling units for refuse and recyclables such as an on-site compactor shall be installed so that an accumulation of debris which attract and/or harbor insects and/or rodents are minimized, effective cleaning is facilitated around and under the unit if it is not installed flush with the base pad.
010-8 Wyo. Code R. § 8-63