19 CFR § 151.10
Sampling
July 16, 2020
When necessary, an authorized CBP official may obtain samples of merchandise for appraisement, classification, or other official purposes. Samples shall be taken by Customs or a commercial gauger approved in accordance with §151.13. Samples shall be marked to ensure identification and retained according to established policies.
[T.D. 87-39, 52 FR 9787, Mar. 26, 1987]