21 CFR 1314.20 - Restrictions on sales quantity.
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(a) Without regard to the number of transactions, a regulated seller (including a mobile retail vendor) may not in a single calendar day sell any purchaser more than 3.6 grams of ephedrine base, 3.6 grams of pseudoephedrine base, or 3.6 grams of phenylpropanolamine base in scheduled listed chemical products.
Title 21 published on 2013-04-01
no entries appear in the Federal Register after this date.