nacaa agrees and supports epa's proposal to make such additional finding out. epa's proposed planting under section 231 sets the stage for harmonizing international and u.s. aircraft security mission standards. with icao expect to adopt a national standard answer as february 2016, we appreciate epa's request to the anpr for input on establishing the standard and the potential use of clean air act section 231, to adopt in government the icao standard domestically. nacaa support the united states continued support for adopting an international standard as well as epa adoption of a domestic standard that will address this category in a significant way. aircraft represents the single largest u.s. transportation source of greenhouse gas emissions not yet subject to greenhouse gas standards. clearly this is a sector that marriage regulation commensurate with other transportation sectors. icao and epa must establish as rigorous and comprehensive a regulatory package as possible. in the u.s. this is especially critical because state and local air pollution control agen

nacaa would like to touch on a few reef issues. first we recommend the engines associated with but not part of an aircraft also be addressed by aircraft co2 standards key among these artillery power unit. secondly recommend epa pursue opportunities for establishing dinners were in use aircraft which can be retrofitted to reduce draft and save fuel. third, although the standard at issue here is for co2, there's also the potential for emission reductions and we encourage the potential to be an life carefully and take steps to maximize reductions. finally, while nacaa supports the establishment, i ko, the full measure of production from this category is critically important. therefore we urge epa be prepared to adopt the international standard college short including the items raised in this testimony. the coming weeks will continue to study these and other issues related to epa's finding and anpr and will offer additional comment by the deadline and in the meantime we appreciate the opportunity to share abuse and look forward to work