These regs are dynamically linked to a .gov computer (at this URL:http://www.access.gpo.gov/nara/cfr/waisidx/).  I believe the following links will take you to the most current regulation.  If these regs are important to your operation,  personnel, equipment, safety, financial investment, etc. then you should check a current copy of the CFR to be sure you have the latest issue of the regs.  HH. 
USCG vapor recovery regulations in "33 CFR Part 154 - Oil Pollution Prevention Regulations for Marine Oil Transfer Facilities":
Section 154.800 Applicability.
Section 154.802 Definitions. As used in this subpart.
Section 154.804 Review, certification, and initial inspection.
Section 154.806 Application for acceptance as a certifying entity.
Section 154.808 Vapor control system, general.
Section 154.810 Vapor line connections.
Section 154.812 Facility requirements for vessel liquid overfill protection.
Section 154.814 Facility requirements for vessel vapor over pressure and vacuum protection.
Section 154.820 Fire, explosion, and detonation protection.
Section 154.822 Detonation arresters, and flame screens.
Section 154.824 Inerting, enriching, and diluting systms.
Section 154.826 Vapor compressors and blowers.
Section 154.828 Vapor recovery and vapor destruction units.
Section 154.840 Personnel training.
Section 154.850 Operational requirements.
Appendix A to Part 154 - Guidelines for Detonation Flame Arresters. (not included here)


You can find links to the CFR at this location:  http://www.access.gpo.gov/nara/cfr/waisidx/
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