19 CFR § 141.104
Computation of duties
July 16, 2020
In computing estimated duties, fractional parts of dollars and quantities shall be rounded off in accordance with §159.3 of this chapter.
[T.D. 73-175, 38 FR 17447, July 2, 1973, as amended by T.D. 99-64, 64 FR 43266, Aug. 10, 1999]