[Code of Federal Regulations] [Title 16, Volume 2] [Revised as of January 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 16CFR1507.4] [Page 536] TITLE 16--COMMERCIAL PRACTICES CHAPTER II--CONSUMER PRODUCT SAFETY COMMISSION PART 1507--FIREWORKS DEVICES--Table of Contents Sec. 1507.4 Bases. The base or bottom of fireworks devices that are operated in a standing upright position shall have the minimum horizontal dimensions or the diameter of the base equal to at least one-third of the height of the device including any base or cap affixed thereto.