An image formation apparatus: previously stores first information allowing functions that a plurality of users are authorized to use, respectively, to be determined; receives second information input to determine a user, the second information allowing that user to be determined; determines from the previously stored first information a normal function that the determined user is authorized to use; is set to make the determined normal function available; receives third information input from a first storage medium having the third information stored therein, to determine an extended function, the third information allowing the extended function to be determined; and is set to make the determined extended function available in addition to the normal function set available.