The earliest reference to these documents is found in a 1414 Act of Parliament.[4][5] In 1540, granting travel documents in England became a role of the Privy Council of England, and it was around this time that the term "passport" was used. In 1794, issuing British passports became the job of the Office of the Secretary of State.[4] The 1548 Imperial Diet of Augsburg required the public to hold imperial documents for travel, at the risk of permanent exile.[6] During World War I, European governments introduced border passport requirements for security reasons, and to control the emigration of people with useful skills.