40 CFR 87.5 - Special test procedures.
The Administrator or the Secretary may, upon written application by a manufacturer or operator of aircraft or aircraft engines, approve test procedures for any aircraft or aircraft engine that is not susceptible to satisfactory testing by the procedures set forth herein. Prior to taking action on any such application, the Administrator or the Secretary shall consult with the other.
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.