19 C.F.R. § 123.51

Commercial samples transported by automobile through Canada between ports in the United States.

(a) General provisions. A commercial traveler arriving at a U.S. frontier port desiring to transport his commercial samples by automobile through Canada to another place in the United States without displaying the samples in Canada may request a U.S. Customs officer at the port of departure to cord and seal the outer containers of the samples if they can be effectively corded and sealed.

(b) List of samples. The traveler shall furnish the U.S. Customs officer at the port of exit a list, in duplicate, of all the articles in the containers, with their approximate values, in substantially the following form:

[T.D. 70-121, 35 FR 8215, May 26, 1970, as amended by T.D. 82-145, 47 FR 35478, Aug. 16, 1982]