40 CFR 180.1364: Chlorate; exemption from the requirement of a tolerance.

Residues of chlorate in or on commodities in the following crop groups are exempt from the requirement of a tolerance when resulting from the application of gaseous chlorine dioxide as a fungicide, bactericide, or antimicrobial pesticide: Vegetable, root and tuber, group 1; Vegetable, bulb, group 3-07; Vegetable, fruiting, group 8-10; vegetable, cucurbit, group 9; Fruit, citrus, group 10-10; Fruit, pome, group 11-10; Fruit, stone, group 12-12; Berry and small fruit, group 13-07; Nut, tree, group 14-12; Grain, cereal, forage, hay, stover, and straw, group 16-22; Grass, forage, fodder and hay, group 17; Animal feed, nongrass, group 18; Fungi, edible, group 21; Fruit, tropical and subtropical, edible peel, group 23; and Fruit tropical and subtropical, inedible peel, group 24.