[Code of Federal Regulations] [Title 14, Volume 1] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR23.31] [Page 177] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 23--AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES--Table of Contents Subpart B--Flight Sec. 23.31 Removable ballast. Removable ballast may be used in showing compliance with the flight requirements of this subpart, if-- (a) The place for carrying ballast is properly designed and installed, and is marked under Sec. 23.1557; and (b) Instructions are included in the airplane flight manual, approved manual material, or markings and placards, for the proper placement of the removable ballast under each loading condition for which removable ballast is necessary. [Doc. No. 4080, 29 FR 17955, Dec. 18, 1964; 30 FR 258, Jan. 9, 1965, as amended by Amdt. 23-13, 37 FR 20023, Sept. 23, 1972]