The following tutorial will show you around the part 478 landing page.
27 CFR Part 447
Importation of Arms, Ammunition and Implements of War
27 CFR Part 478
Commerce in Firearms and Ammunition
27 CFR Part 479
Machine Guns, Destructive Devices, and Certain Other Firearms
27 CFR Part 555
Commerce in Explosives
27 CFR Part 646
Contraband Cigarettes
27 CFR Part 771
Rules of Practice in Explosive License and Permit Proceedings
Effective date is the date this part was last amended
A licensee continuing to conduct business at the location shown on his license is not required to obtain a new license by reason of a mere change in trade name under which he conducts his business: Provided, That such licensee furnishes his license for endorsement of such change to the Chief, Federal Firearms Licensing Center within 30 days from the date the licensee begins his business under the new trade name.