None of us in the know will have these rules bookmarked and handy for distribution. If you want to confirm this info, go to the same place on the ATF website where it would explain all the other commonly known rules...such as it being unlawful for a non-licensee (individual) to ship a firearm to another non-licensee (individual) across state lines, etc. We don't know exactly where that is stated but we all know it to be true.
Thats easily found:
How may an unlicensed person receive a firearm in his or her State that he or she purchased from an out–of–State source?
An unlicensed person who is not prohibited from receiving or possessing firearms may purchase a firearm from an out–of–State source, provided the transfer takes place through a Federal firearms licensee in his or her State of residence.
[18 U.S.C 922(a)(3) and 922(b)(3); 27 CFR 478.29]