15 C.F.R. § 712.1 Round to zero rule that applies to activities involving Schedule 1 chemicals.
Title 15 - Commerce and Foreign Trade
Facilities that produce, export or import mixtures containing less than 0.5% aggregate quantities of Schedule 1 chemicals (see Supplement No. 1 to this part) as unavoidable by-products or impurities may round to zero and are not subject to the provisions of this part 712. Schedule 1 content may be calculated by volume or weight, whichever yields the lesser percent. Note that such mixtures may be subject to the regulatory requirements of other federal agencies.
Title 15: Commerce and Foreign Trade
PART 712—ACTIVITIES INVOLVING SCHEDULE 1 CHEMICALS
§ 712.1 Round to zero rule that applies to activities involving Schedule 1 chemicals.

