7 C.F.R. § 319.77-2
In order to prevent the spread of gypsy moth from Canada into noninfested areas of the United States, the gypsy moth host materials listed in paragraphs (a) through (e) of this section are designated as regulated articles. Regulated articles may be imported into the United States from Canada only under the conditions described in § 319.77-4 of this subpart.
[64 FR 45866, Aug. 23, 1999, as amended at 71 FR 40878, July 19, 2006; 83 FR 11866, Mar. 19, 2018; 84 FR 29958, June 25, 2019]