What type of gesture does Minority languages of Austria and Austrian State Treaty have in common?
Austrian State Treaty The Austrian State Treaty (German:    ) or Austrian Independence Treaty re-established Austria as a sovereign state. It was signed on 15 May 1955 in Vienna, at the Schloss Belvedere among the Allied occupying powers (France, the United Kingdom, the United States, and the Soviet Union) and the Austrian government. It officially came into force on 27 July 1955.
Mouthing In sign language, mouthing is the production of visual syllables with the mouth while signing. That is, signers sometimes say or mouth a word in a spoken language at the same time as producing the sign for it. Mouthing is one of the many ways in which the face and mouth is used while signing. Although not present in all sign languages, and not in all signers, where it does occur it may be an essential (that is, phonemic) element of a sign, distinguishing signs which would otherwise be homophones; in other cases a sign may seen to be flat and incomplete without mouthing even if it is unambiguous. Other signs use a combination of mouth movements and hand movements to indicate the sign; for example, the ASL sign for includes a mouth gesture where the mouth is slightly open. In such cases, mouthing is not available.