Characteristic level
Characteristic level has the meaning given in Appendix 6 of ICAO Annex 16 (as of July 2008). The characteristic level is a calculated emission level for each pollutant based on a statistical assessment of measured emissions from multiple tests.
Source
40 CFR § 87.1
Scoping language
The definitions in this section apply to this part. The definitions apply to all subparts. Any terms not defined in this section have the meaning given in the Clean Air Act. The definitions follow: