In France aviators were awarded their Aviator Certificates (Pilot Licences) by l'Aéro Club de France.Until the end of December 1909, l'Aéro-Club had issued unnumbered licences without examination. Sixteen had been issued up until a list was published in alphabetic order (more or less) on 1 January 1910. After the allocation of numbers two further licences were issued in December 1909 prior to the publication of the initial list and so added with subsequent numbers. Licences were subsequently allocated by passing tests, although the registration dates of licences were often delayed.

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In Britain aviators were awarded their Aviator's Certificate (Pilot's Licence) by the Royal Aero Club of Great Britain.

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Standards varied in different countries. America was particularly lax until well after the First World War with regard to the need for pilot licences which resulted in many American pilots never gaining an official licence. When the first five were allocated in 1911, the Aero Club adopted the approach of l'Aéro Club de France by issuing the first five licence numbers in alphabetical sequence.

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