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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter C - Air Programs |
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Part 91 - Control of Emissions from Marine Spark-Ignition Engines |
| § 91.1 - Applicability. |
| Subpart A - General |
| § 91.2 - Applicable date. |
| § 91.3 - Definitions. |
| § 91.4 - Acronyms and abbreviations. |
| § 91.5 - Table and figure numbering; position. |
| § 91.6 - Reference materials. |
| § 91.7 - Treatment of confidential information. |
| Subpart B - Emission Standards and Certification Provisions |
| § 91.101 - Applicability. |
| § 91.102 - Definitions. |
| § 91.103 - Averaging, banking, and trading of exhaust emission credits. |
| § 91.104 - Exhaust emission standards for outboard and personal watercraft engines. |
| § 91.105 - Useful life period, recall, and warranty periods. |
| § 91.106 - Certificate of conformity. |
| § 91.107 - Application for certification. |
| § 91.108 - Certification. |
| § 91.109 - Requirement of certification - closed crankcase. |
| § 91.110 - Requirement of certification - prohibited controls. |
| § 91.111 - Requirement of certification - prohibition of defeat devices. |
| § 91.112 - Requirement of certification - adjustable parameters. |
| § 91.113 - Requirement of certification - emission control information label and engine identification number. |
| § 91.114 - Requirement of certification - supplying production engines upon request. |
| § 91.115 - Certification procedure - determining engine power and engine families. |
| § 91.116 - Certification procedure - test engine selection. |
| § 91.117 - Certification procedure - service accumulation. |
| § 91.118 - Certification procedure - testing. |
| § 91.119 - Certification procedure - use of special test procedures. |
| § 91.120 - Compliance with Family Emission Limits over useful life. |
| § 91.121 - Certification procedure - recordkeeping. |
| § 91.122 - Amending the application and certificate of conformity. |
| § 91.123 - Denial, revocation of certificate of conformity. |
| § 91.124 - Request for hearing. |
| § 91.125 - Hearing procedures. |
| § 91.126 - Right of entry and access. |
| Subpart C - Averaging, Banking, and Trading Provisions |
| § 91.201 - Applicability. |
| § 91.202 - Definitions. |
| § 91.203 - General provisions. |
| § 91.204 - Averaging. |
| § 91.205 - Banking. |
| § 91.206 - Trading. |
| § 91.207 - Credit calculation and manufacturer compliance with emission standards. |
| § 91.208 - Certification. |
| § 91.209 - Maintenance of records. |
| § 91.210 - End-of-year and final reports. |
| § 91.211 - Notice of opportunity for hearing. |
| Subpart D - Emission Test Equipment Provisions |
| § 91.301 - Scope; applicability. |
| § 91.302 - Definitions. |
| § 91.303 - Acronyms and abbreviations. |
| § 91.304 - Test equipment overview. |
| § 91.305 - Dynamometer specifications and calibration accuracy. |
| § 91.306 - Dynamometer torque cell calibration. |
| § 91.307 - Engine cooling system. |
| § 91.308 - Lubricating oil and test fuel. |
| § 91.309 - Engine intake air temperature measurement. |
| § 91.310 - Engine intake air humidity measurement. |
| § 91.311 - Test conditions. |
| § 91.312 - Analytical gases. |
| § 91.313 - Analyzers required. |
| § 91.314 - Analyzer accuracy and specifications. |
| § 91.315 - Analyzer initial calibration. |
| § 91.316 - Hydrocarbon analyzer calibration. |
| § 91.317 - Carbon monoxide analyzer calibration. |
| § 91.318 - Oxides of nitrogen analyzer calibration. |
| § 91.319 - NOX converter check. |
| § 91.320 - Carbon dioxide analyzer calibration. |
| § 91.321 - NDIR analyzer calibration. |
| § 91.322 - Calibration of other equipment. |
| § 91.323 - Analyzer bench checks. |
| § 91.324 - Analyzer leakage check. |
| § 91.325 - Analyzer interference checks. |
| § 91.326 - Pre- and post-test analyzer calibration. |
| § 91.327 - Sampling system requirements. |
| § 91.328 - Measurement equipment accuracy/calibration frequency table. |
| § 91.329 - Catalyst thermal stress test. |
| Appendix A to Subpart D of Part 91 - Tables |
| Appendix B to Subpart D of Part 91 - Figures |
| Subpart E - Gaseous Exhaust Test Procedures |
| § 91.401 - Scope; applicability. |
| § 91.402 - Definitions. |
| § 91.403 - Symbols and abbreviations. |
| § 91.404 - Test procedure overview. |
| § 91.405 - Recorded information. |
| § 91.406 - Engine parameters to be measured and recorded. |
| § 91.407 - Engine inlet and exhaust systems. |
| § 91.408 - Pre-test procedures. |
| § 91.409 - Engine dynamometer test run. |
| § 91.410 - Engine test cycle. |
| § 91.411 - Post-test analyzer procedures. |
| § 91.412 - Data logging. |
| § 91.413 - Exhaust sample procedure - gaseous components. |
| § 91.414 - Raw gaseous exhaust sampling and analytical system description. |
| § 91.415 - Raw gaseous sampling procedures. |
| § 91.416 - Intake air flow measurement specifications. |
| § 91.417 - Fuel flow measurement specifications. |
| § 91.418 - Data evaluation for gaseous emissions. |
| § 91.419 - Raw emission sampling calculations. |
| § 91.420 - CVS concept of exhaust gas sampling system. |
| § 91.421 - Dilute gaseous exhaust sampling and analytical system description. |
| § 91.423 - Exhaust gas analytical system; CVS grab sample. |
| § 91.424 - Dilute sampling procedure - CVS calibration. |
| § 91.425 - CVS calibration frequency. |
| § 91.426 - Dilute emission sampling calculations. |
| § 91.427 - Catalyst thermal stress resistance evaluation. |
| Appendix A to Subpart E of Part 91 - Tables |
| Appendix B to Subpart E of Part 91 - Figures |
| Subpart F - Manufacturer Production Line Testing Program |
| § 91.501 - Applicability. |
| § 91.502 - Definitions. |
| § 91.503 - Production line testing by the manufacturer. |
| § 91.504 - Maintenance of records; submittal of information. |
| § 91.505 - Right of entry and access. |
| § 91.506 - Engine sample selection. |
| § 91.507 - Test procedures. |
| § 91.508 - Cumulative Sum (CumSum) procedure. |
| § 91.509 - Calculation and reporting of test results. |
| § 91.510 - Compliance with criteria for production line testing. |
| § 91.511 - Suspension and revocation of certificates of conformity. |
| § 91.512 - Request for public hearing. |
| § 91.513 - Administrative procedures for public hearing. |
| § 91.514 - Hearing procedures. |
| § 91.515 - Appeal of hearing decision. |
| § 91.516 - Treatment of confidential information. |
| Subpart G - Selective Enforcement Auditing Regulations |
| § 91.601 - Applicability. |
| § 91.602 - Definitions. |
| § 91.603 - Applicability of part 91, subpart F. |
| § 91.604 - Test orders. |
| § 91.605 - Testing by the Administrator. |
| § 91.606 - Sample selection. |
| § 91.607 - Test procedures. |
| § 91.608 - Compliance with acceptable quality level and passing and failing criteria for selective enforcement audits. |
| Appendix A to Subpart G of Part 91 - Sampling Plans for Selective Enforcement Auditing of Marine Engines |
| Subpart H - Importation of Nonconforming Marine Engines |
| § 91.701 - Applicability. |
| § 91.702 - Definitions. |
| § 91.703 - Admission. |
| § 91.704 - Exemptions and exclusions. |
| § 91.705 - Prohibited acts; penalties. |
| § 91.706 - Treatment of confidential information. |
| § 91.707 - Importation of partially complete engines. |
| Subpart I - In-Use Testing and Recall Regulations |
| § 91.801 - Applicability. |
| § 91.802 - Definitions. |
| § 91.803 - Manufacturer in-use testing program. |
| § 91.804 - Maintenance, procurement and testing of in-use engines. |
| § 91.805 - In-use test program reporting requirements. |
| § 91.806 - Voluntary emissions recall. |
| Subpart J - Emission-related Defect Reporting Requirements, Voluntary Emission Recall Program |
| § 91.901 - Applicability. |
| § 91.902 - Definitions. |
| § 91.903 - Applicability to part 85, subpart T. |
| § 91.904 - Voluntary emission recall. |
| § 91.905 - Reports, voluntary recall plan filing, record retention. |
| § 91.906 - Responsibility under other legal provisions preserved. |
| § 91.907 - Disclaimer of production warranty applicability. |
| Subpart K - Exclusion and Exemption of Marine SI Engines |
| § 91.1001 - Applicability. |
| § 91.1002 - Definitions. |
| § 91.1003 - Exclusions based on section 216(10) of the Act. |
| § 91.1004 - Who may request an exemption. |
| § 91.1005 - Testing exemption. |
| § 91.1006 - Manufacturer-owned exemption and precertification exemption. |
| § 91.1007 - Display exemption. |
| § 91.1008 - National security exemption. |
| § 91.1009 - Export exemptions. |
| § 91.1010 - Granting of exemptions. |
| § 91.1011 - Submission of exemption requests. |
| § 91.1012 - Treatment of confidential information. |
| § 91.1013 - Exemption for certified Small SI engines. |
| Subpart L - Prohibited Acts and General Enforcement Provisions |
| § 91.1101 - Applicability. |
| § 91.1102 - Definitions. |
| § 91.1103 - Prohibited acts. |
| § 91.1104 - General enforcement provisions. |
| § 91.1105 - Injunction proceedings for prohibited acts. |
| § 91.1106 - Penalties. |
| § 91.1107 - Warranty provisions. |
| § 91.1108 - In-use compliance provisions. |
| Subpart M - Emission Warranty and Maintenance Instructions |
| § 91.1201 - Applicability. |
| § 91.1202 - Definitions. |
| § 91.1203 - Emission warranty, warranty period. |
| § 91.1204 - Furnishing of maintenance and use instructions to ultimate purchaser. |
| Subpart N - In-Use Credit Program for New Marine Engines |
| § 91.1301 - Applicability. |
| § 91.1302 - Definitions. |
| § 91.1303 - General provisions. |
| § 91.1304 - Averaging. |
| § 91.1305 - Banking. |
| § 91.1306 - Trading. |
| § 91.1307 - Credit calculation. |
| § 91.1308 - Maintenance of records. |
| § 91.1309 - Reporting requirements. |
| § 91.1310 - Notice of opportunity for hearing. |
| §§ 91.2--91.3 - [Reserved] |