[Code of Federal Regulations] [Title 46, Volume 1] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR32.20-5] [Page 428] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PART 32_SPECIAL EQUIPMENT, MACHINERY, AND HULL REQUIREMENTS--Table Subpart 32.20_Equipment Installations Sec. 32.20-5 Pressure vacuum relief valves--TB/ALL. The pressure vacuum relief valve shall be of a type and size approved by the Commandant for the purpose intended. For specifications and procedures re approval, see subpart 162.017 of subchapter Q (Specifications) of this chapter.