Subpart A -- Determining How to Follow This Part
      §1048.1 Does this part apply to me?
      §1048.5 Which engines are excluded or exempted from this part's requirements?
      §1048.10 What main steps must I take to comply with this part?
      §1048.15 Do any other regulation parts affect me?
      §1048.20 What requirements from this part apply to my excluded engines?
   Subpart B -- Emission Standards and Related Requirements
      §1048.101 What exhaust emission standards must my engines meet?
      §1048.105 What evaporative emissions standards and requirements apply?
      §1048.110 How must my engines diagnose malfunctions?
      §1048.115 What other requirements must my engines meet?
      §1048.120 What warranty requirements apply to me?
      §1048.125 What maintenance instructions must I give to buyers?
      §1048.130 What installation instructions must I give to equipment manufacturers?
      §1048.135 How must I label and identify the engines I produce?
      §1048.140 What are the provisions for certifying Blue Sky Series engines?
      §1048.145 What provisions apply only for a limited time?
   Subpart C -- Certifying Engine Families
      §1048.201 What are the general requirements for submitting a certification application?
      §1048.205 What must I include in my application?
      §1048.210 May I get preliminary approval before I complete my application?
      §1048.215 What happens after I complete my application?
      §1048.220 How do I amend the maintenance instructions in my application?
      §1048.225 How do I amend my application to include new or modified engines?
      §1048.230 How do I select engine families?
      §1048.235 What emission testing must I perform for my application for a certificate of conformity?
      §1048.240 How do I demonstrate that my engine family complies with exhaust emission standards?
      §1048.245 How do I demonstrate that my engine family complies with evaporative emission standards?
      §1048.250 What records must I keep and make available to EPA?
      §1048.255 When may EPA deny, revoke, or void my certificate of conformity?
   Subpart D -- Testing Production-line Engines
      §1048.301 When must I test my production-line engines?
      §1048.305 How must I prepare and test my production-line engines?
      §1048.310 How must I select engines for production-line testing?
      §1048.315 How do I know when my engine family fails the production-line testing requirements?
      §1048.320 What happens if one of my production-line engines fails to meet emission standards?
      §1048.325 What happens if an engine family fails the production-line requirements?
      §1048.330 May I sell engines from an engine family with a suspended certificate of conformity?
      §1048.335 How do I ask EPA to reinstate my suspended certificate?
      §1048.340 When may EPA revoke my certificate under this subpart and how may I sell these engines again?
      §1048.345 What production-line testing records must I send to EPA?
      §1048.350 What records must I keep?
   Subpart E -- Testing In-use Engines
      §1048.401 What testing requirements apply to my engines that have gone into service?
      §1048.405 How does this program work?
      §1048.410 How must I select, prepare, and test my in-use engines?
      §1048.415 What happens if in-use engines do not meet requirements?
      §1048.420 What in-use testing information must I report to EPA?
      §1048.425 What records must I keep?
   Subpart F -- Test Procedures
      §1048.501 What procedures must I use to test my engines?
      §1048.505 What steady-state duty cycles apply for laboratory testing?
      §1048.510 What transient duty cycles apply for laboratory testing?
      §1048.515 Field-testing procedures.
   Subpart G -- Compliance Provisions
      §1048.601 What compliance provisions apply to these engines?
      §1048.605 What are the provisions for exempting engines from the requirements of this part if they are already certified under the motor-vehicle program?
      §1048.610 What are the provisions for producing nonroad equipment with engines already certified under the motor-vehicle program?
      §1048.615 What are the provisions for exempting engines designed for lawn and garden applications?
      §1048.620 What are the provisions for exempting large engines fueled by natural gas?
      §1048.625 What special provisions apply to engines using noncommercial fuels?
   Subpart I -- Definitions and Other Reference Information
      §1048.801 What definitions apply to this part?
      §1048.805 What symbols, acronyms, and abbreviations does this part use?
      §1048.810 What materials does this part reference?
      §1048.815 How should I request EPA to keep my information confidential?
      §1048.820 How do I request a hearing?
      Appendix I to Part 1048 -- Large Spark-ignition (SI) Transient Cycle for Constant-Speed Engines
      Appendix II to Part 1048 -- Large Spark-ignition (SI) Composite Transient Cycle