[Code of Federal Regulations] [Title 33, Volume 2] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR157.49] [Page 472] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 157--RULES FOR THE PROTECTION OF THE MARINE ENVIRONMENT RELATING TO TANK VESSELS CARRYING OIL IN BULK--Table of Contents Subpart C--Vessel Operation Sec. 157.49 Instruction manual. The master of a tank vessel shall ensure that the instruction manual under Sec. 157.23 is available and used when the cargo or ballast systems are operated.