Section 52.2477 - Original identification of plan section(a) This section identified the original "Air Implementation Plan for the State of Washington" and all revisions submitted by Washington that were Federally approved prior to March 20, 2013. The information in this section is available in the 40 CFR, part 52, Volume 3 of 3 (§§ 52.2020 to End) edition revised as of July 1, 2012. 81 FR 1131 , Jan. 11, 2016