ICAO DOC 9835 Manual on the Implementation of ICAO Language Proficiency Requirements Ed 2, 2010.

This manual provides guidance on the implementation of the ICAO language proficiency Standards for flight crew and air traffic controllers. It contains comprehensive information on a range of aspects related to language proficiency and training that will assist Contracting States, operators and air traffic services providers in implementing efficient language training and testing. It also contains information that will help the language training and testing industry in providing services that are relevant to the civil aviation context.