Section 001-332-21 - PEST CONTROLA. No pests shall be allowed in any area of an establishment. Effective measures shall be taken to exclude pests from the processing areas and to protect against the contamination of food on the premises by pests. B. Where necessary, adequate screening or other protection against pests shall be provided.C. The use of insecticides or rodenticides is permitted only under precautions and restrictions that will protect against the contamination of food, food-contact surfaces, and food-packaging materials.01-001 C.M.R. ch. 332, § 21