Section 52.1783 - Original identification of plan section(a) This section identified the original "Air Implementation Plan for the State of North Carolina" and all revisions submitted by North Carolina that were federally approved prior to December 1, 1998. The information in this section is available in the 40 CFR, part 52 edition revised as of July 1, 1999, the 40 CFR, part 52, Volume 2 of 2 (§§ 52.1019 to End) editions revised as of July 1, 2000 through July 1, 2011, and the 40 CFR, part 52, Volume 2 of 3 (§§ 52.1019 to 52.2019 ) editions revised as of July 1, 2012. 79 FR 30051 , May 27, 2014