preamble_15
Council Directive 91/670/EEC of 16 December 1991 on mutual acceptance of personnel licences for the exercise of functions in civil aviation · European Union
Whereas, if in order to be permitted to operate aircraft registered in a Member State other than that where they obtained their licence, professional pilots have to be subjected to additional tests, they should be offered the possibility of sitting such tests as soon as possible;
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Source: EUR-Lex (Cellar) · retrieved 2026-11-04 · Text as adopted (Official Journal); later amendments are not incorporated in this text.