The New Source Performance Standards (NSPS) for Stationary Spark Ignition (SI) Internal Combustion Engines is outlined in the Code of Federal Regulations under 40 CFR Part 60 Subpart JJJJ.

The following is a timeline of regulatory actions that have formed the current regulation

• January 18, 2008 - Final NSPS for stationary SI internal combustion engines
  • Final Rule – January 18, 2008
    • Fact Sheet: Final Emission Standards of Performance for Stationary Spark Ignition Internal Combustion Engines and Final Air Toxics Standards for Reciprocating Internal Combustion Engines
  • Proposed Rule – June 12, 2006
    • Proposed Rule Correction – June 26, 2006
    • Extension of Public Comment Period – July 27, 2006
  • Supporting documents and comments for this rulemaking