A compulsory, universal ID system based on personal ID cards has been in place in Greece since World War II. ID cards are issued by the police on behalf of the Headquarters of the Police (previously issued by the Ministry of Public Order, now incorporated in the Ministry of Internal Affairs) and display the holder's signature, standardized face photograph, name and surname, legal ascendants name and surname, date and place of birth, height, municipality, and the issuing police precinct. There are also two optional fields designed to facilitate emergency medical care: ABO and Rhesus factor blood typing.