RE:RE:There is no guarantee whatsoever, that Schedule 3 substances can be imported into USA per the existing federal code on imports + the existing definition of marijuana within that code as "non-narcotic" as long as the importer is "registered".
No person shall import Schedule 3 "non-narcotic" ...unless and until such person is properly registered...
Firstly, per the definition page #2 part (17):
https://www.govinfo.gov/content/pkg/USCODE-2021-title21/pdf/USCODE-2021-title21-chap13-subchapI-partA-sec802.pdf
...Marijuana is NOT categorized as a "Narcotic" for purposes of IMPORTATION AND EXPORTATION OF CONTROLLED SUBSTANCES.
THE CODE OF FEDERAL REGULATIONS:
1312.11 Requirement of authorization to import:
https://www.ecfr.gov/current/title-21/chapter-II/part-1312/subject-group-ECFRc11ae182f37bc43/section-1312.11
No person shall import, or cause to be imported, into the customs territory of the United States from any place outside thereof (but within the United States), or into the United States from any place outside thereof, any non-narcotic controlled substance listed in Schedule III, IV, or V, excluding those described in paragraph (a) of this section, unless and until such person is properly registered under the Act (or, in accordance with part 1301 of this chapter, exempt from registration) and has filed an import declaration to do so in accordance with § 1312.18.