The documents in question include protocols signed on July 11 by Turkey’s ambassador to the Council of Europe in Strasbourg, Erdoğan İşcan, which make Turkey a full partner to the 1957 European Convention on Extradition. While listing the exceptions of granting political asylum to individuals from other countries, the convention says “the taking or attempted taking of the life of a head of state, or a member of his family, shall not be deemed a political offence for the purposes of this convention.”

The sentence was copied and pasted to the Treaty on Extradition and Mutual Assistance in Criminal Matters between the U.S. and Turkey, which was signed in 1979 and entered into force on Jan. 1, 1981.