(6) The Federal Constitution, which was amended by referendum on 18 April 1999 and which entered into force on 1 January 2000, gives every person the right to have his privacy respected and, in particular, to be protected from the misuse of data concerning him. The Federal Court has, on the basis of the previous Constitution, which did not contain any such provision, developed a case-law laying down the general principles applicable to the processing of personal data concerning, in particular, the quality of the data processed, the right of access of the persons concerned, and the right to request the correction or destruction of data. These principles are binding both on the Federation and on each canton.