Regulations last checked for updates: Oct 31, 2025

Title 40 - Protection of Environment last revised: Sep 30, 2029
All TitlesTitle 40Chapter IPart 63Subpart DDDDDAppendix - Table 13 to Subpart DDDDD of Part 63—Alternative Emission Limits for New or Reconstructed Boilers and Process Heaters That Commenced Construction or Reconstruction After December 23, 2011, and Before April 1, 2013
Collapse to view onlyAppendix - Table 13 to Subpart DDDDD of Part 63—Alternative Emission Limits for New or Reconstructed Boilers and Process Heaters That Commenced Construction or Reconstruction After December 23, 2011, and Before April 1, 2013
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authority: 42 U.S.C. 7401
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