[Code of Federal Regulations] [Title 14, Volume 2] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR121.131] [Page 356] TITLE 14--AERONAUTICSAND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 121--OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS--Table of Contents Subpart G--Manual Requirements Sec. 121.131 Applicability. This subpart prescribes requirements for preparing and maintaining manuals by all certificate holders. [Doc. No. 6258, 29 FR 19196, Dec. 31, 1964]