CFR 40-180.3-2014 Protection of Environment. Part180:Tolerances and exemptions for pesticide chemical residues in food. Section180.3:Tolerances for related pesticide chemicals.
(a) Pesticide chemicals that cause related pharmacological effects will be regarded, in the absence of evidence to the contrary, as having an additive deleterious action. (For example, many pesticide chemicals within each of the following groups have related pharmacological effects: Chlorinated organic pesticides, arsenic-containing chemicals,metallic dithiocarbamates, cholinesterase-inhibiting pesticides.)
CFR 40-180.3-2014 history
2014CFR 40-180.3-2014 Protection of Environment. Part180:Tolerances and exemptions for pesticide chemical residues in food. Section180.3:Tolerances for related pesticide chemicals.