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| Type | Title | Date | State |
| Proposed Regulations | 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Transportation Conformity Regulations | 11/20/2009 | National |
| Notices | Adequacy Status of the Tennessee Portion of the Bi-State Memphis Maintenance Plan 8-Hour Ozone Motor Vehicle Emission Budgets for Transportation Conformity Purposes | 11/12/2009 | National |
| Notices | Control of Emissions from New Highway Vehicles and Engines: Approval of New Scheduled Maintenance for Selective Catalyst Reduction Technologies | 11/09/2009 | National |
| Proposed Regulations | 40 CFR 86 and 600 - Public Hearing Locations for the Proposed Rulemaking to Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards | 10/06/2009 | National |
| Notices | Meeting of the Mobile Sources Technical Review Subcommittee | 09/09/2009 | National |
| Proposed Regulations | 40 CFR 80, et al. - Control of Emissions from New Marine Compression-Ignition Engines at or Above 30 Liters per Cylinder | 08/28/2009 | National |
| Notices | Adequacy Status of the Municipality of Guaynabo, PR submitted PM10 Limited Maintenance Plan for Transportation Conformity Purposes | 08/10/2009 | National |
| Notices | Agency Information Collection Activities; Emissions Certification and Compliance Requirements for Locomotives and Locomotive Engines (Renewal) | 07/22/2009 | National |
| Proposed Regulations | 40 CFR 80, 85, 86, 94, 1027, 1033, 1039, 1042, 1043, 1045, 1048, 1051, 1054, 1060, 1065, and 1068 - Public Hearing for the Category 3 Marine Rule | 07/08/2009 | National |
| Notices | California State Motor Vehicle Pollution Control Standards; Notice of Decision Granting a Waiver of Clean Air Act Preemption for California's 2009 and Subsequent Model Year Greenhouse Gas Emission Standards for New Motor Vehicles | 07/08/2009 | National |
| Notices | Notice of Upcoming Joint Rulemaking to Establish Vehicle GHG Emissions and CAFE Standards | 05/22/2009 | National |
| Notices | Adequacy Status of the Cleveland/Akron, Ohio and the Columbus, Ohio Submitted 8-Hour Ozone Redesignation and Maintenance Plans for Transportation Conformity Purposes | 05/20/2009 | National |
| Final Regulations | 46 CFR 8 - International Air Pollution Prevention Certificates | 05/08/2009 | National |
| Notices | Adequacy Status of the Crittenden County, AR Maintenance Plan 8-Hour Ozone Motor Vehicle Emission Budgets for Transportation Conformity Purposes | 05/07/2009 | National |
| Notices | Adequacy Status of the 2008 Reasonable Further Progress Plan for the Delaware Portion of the Philadelphia-Wilmington-Atlantic City 8-Hour Ozone Nonattainment Area Motor Vehicle Emission Budgets; Correction | 04/06/2009 | National |
| Notices | Meeting of the Mobile Sources Technical Review Subcommittee | 03/31/2009 | National |
| Final Regulations | 40 CFR 86, 89, 90, 1027, 1033, 1042, 1048, 1054, 1060, 1065, and 1068 - Control of Air Pollution From New Motor Vehicles and New Motor Vehicle Engines | 02/24/2009 | National |
| Notices | Agency Information Collection Activities; Exclusion Determinations for New Non-road Spark-Ignited Engines, New Non-road Compression-Ignited Engines and New On-Road Heavy Duty Engines (Renewal) | 02/24/2009 | National |
| Notices | Agency Information Collection Activities; Data Reporting Requirements for State and Local Vehicle Emission Inspection and Maintenance (I/M) Programs (Renewal) | 02/12/2009 | National |
| Notices | Adequacy Status of Motor Vehicle Emissions Budgets in Submitted San Joaquin Valley 8-Hour Ozone Reasonable Further Progress and Attainment Plan for Transportation Conformity Purposes; California | 01/22/2009 | National |
| Notices | California State Nonroad Engine and Vehicle Pollution Control Standards; Authorization of Transport Refrigeration Unit Engine Standards, Notice of Decision | 01/16/2009 | National |
| Notices | Control of Emissions From New and In-use Highway Vehicles and Engines: Approval of New Scheduled Maintenance for Exhaust Recirculation Valves in Certain Applications | 12/24/2008 | National |
| Notices | Agency Information Collection Activities: Servicing of Motor Vehicle Air Conditioners (Renewal) | 12/23/2008 | National |
| Notices | Delaware; Adequacy Status of the 2008 Reasonable Further Progress Plan for the Delaware Portion of the Philadelphia-Wilmington-Atlantic City 8-Hour Ozone Nonattainment Area Motor Vehicle Emission Budgets | 12/19/2008 | National |
| Notices | Pennsylvania; Adequacy Status of the 2008 Reasonable Further Progress Plan for the Pennsylvania Portion of the Philadelphia-Wilmington-Atlantic City 8-Hour Ozone Nonattainment Area Motor Vehicle Emission Budgets | 12/19/2008 | National |
| Final Regulations | Correction - 40 CFR 1045, 1054, and 1065 - Control of Emissions from Nonroad Spark-Ignition Engines and Equipment | 12/04/2008 | National |
| Notices | Adequacy Status of Motor Vehicle Emissions Budgets in Submitted 8-Hour Ozone Early Progress Plan for Eastern Kern County for Transportation Conformity Purposes; California | 11/25/2008 | National |
| Notices | California State Nonroad Engine Pollution Control Standards; California Nonroad Compression Ignition Engines--In-Use Fleets; Authorization Request; Extension of Comment Period | 11/14/2008 | National |
| Proposed Regulations | 10 CSR 10-5.381 - On-board Diagnostics Motor Vehicle Emissions Inspection | 11/04/2008 | National |
| Final Regulations | Correction - 40 CFR 1051 - Control of Emissions from Recreational Engines and Vehicles | 10/21/2008 | National |
| Final Regulations | 40 CFR 80 - Control of Hazardous Air Pollutants from Mobile Sources: Early Credit Technology Requirement Revision | 10/16/2008 | National |
| Final Regulations | 40 CFR 9, 60, 80 et al. - Control of Emissions from Nonroad Spark-Ignition Engines and Equipment | 10/08/2008 | National |
| Notices | Agency Information Collection Activities; Nonconformance Penalties for Heavy-Duty Engines and Heavy-Duty Vehicles, Including Light-Duty Trucks (Renewal) | 10/07/2008 | National |
| Notices | California State Nonroad Engine Pollution Control Standards; California Nonroad Compression Ignition Engines--In-Use Fleets; Authorization Request; Opportunity for Public Hearing | 10/07/2008 | National |
| Notices | California State Nonroad Engine Pollution Control Standards; California Nonroad Compression Ignition Engines; Within-the-Scope Request; Opportunity for Public Hearing | 10/07/2008 | National |
| Notices | Agency Information Collection Activities; Data Reporting Requirements for State and Local Vehicle Emission Inspection and Maintenance (I/M) Programs | 10/01/2008 | National |
| Notices | Agency Information Collection Activities; Reporting and Recordkeeping Requirements for the Enforcement Policy Regarding the Sale and Use of Aftermarket Catalytic Converters | 09/30/2008 | National |
| Notices | California State Motor Vehicle Pollution Control Standards; Notice of Waiver of Clean Air Act Preemption; California's 2010 Model Year Heavy-Duty Vehicle and Engine On-Board Diagnostic Standards | 09/08/2008 | National |
| Notices | Meeting of the Mobile Sources Technical Review Subcommittee | 08/14/2008 | National |
| Notices | Adequacy Status of the Submitted 2009 VOC and NOx Motor Vehicle Emissions Budgets for Transportation Conformity Purposes; New Hampshire; Boston-Manchester-Portsmouth, New Hampshire, 8-Hour Ozone Area | 07/28/2008 | National |
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