[Code of Federal Regulations] [Title 14, Volume 1] [Revised as of January 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR31.16] [Page 752] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 31--AIRWORTHINESS STANDARDS: MANNED FREE BALLOONS--Table of Contents Subpart B--Flight Requirements Sec. 31.16 Empty weight. The empty weight must be determined by weighing the balloon with installed equipment but without lifting gas or heater fuel. [Amdt. 31-4, 45 FR 60179, Sept. 11, 1980]