1625-AB44 201110 The Regulatory Plan and the Unified Agenda of Federal Regulatory and Deregulatory Actions 1625 U.S. Coast Guard USCG 1600 Department of Homeland Security DHS Carbon Dioxide Fire Suppression Systems on Commercial Vessels The Coast Guard proposes to amend the current regulations for carbon dioxide fire suppression systems on commercial vessels. This proposed rule concerns the use of carbon dioxide (CO2) flooding systems to suppress fires on commercial vessels. Once, carbon dioxide systems were the only fire suppression systems that were suitable for certain manned spaces, but the potential lethality of carbon dioxide has always been a concern. In recent years, alternative systems have been developed that are comparable to carbon dioxide fire suppression, but are much safer in the event of an accidental discharge, or a discharge that takes place prematurely, before workers can evacuate the protected space. We would amend existing regulations to clarify that approved alternatives to carbon dioxide systems may be used, add new regulations to set general parameters for those approved alternatives, and add a new requirement for lockout valves in manned spaces using carbon dioxide systems. Other Significant Previously Published in The Unified Agenda Final Rule Stage Undetermined No 46 CFR 13 46 CFR 25 46 CFR 27 46 CFR 34 46 CFR 76 46 CFR 95 46 CFR 108 46 CFR 118 33 USC 1903(b) 43 USC 1333 46 USC 2103 46 USC 3306 46 USC 3703 46 USC 4102 46 USC 4302 46 USC 4502 46 USC 6101 EO 12234 45 FR 58801 3 CFR, 1980 Comp p 277 DHS Delegation No 0170.1 No NPRM 02/24/2010 75 FR 8432 NPRM Comment Period End 05/25/2010 Final Rule 01/00/2012 The docket number for this rulemaking is USCG-2006-24797. The docket can be found at www.regulations.gov. No No None No www.regulations.gov www.regulations.gov No No 1625-AB04 Previously reported as Suzanne Hemann LCDR 1625 U.S. Coast Guard USCG 202 372-1356 suzanne.e.hemann@uscg.mil Commandant (CG-5214), 2100 Second Street SW., STOP 7126, Washington DC 20593-7126