The label_encodings file is a flat text file. On a system that is configured with Trusted Extensions, the label of the file is ADMIN_HIGH to prevent regular users from reading it. The maximum line length in the label_encodings file is 256 bytes. The file can be edited with any text editor. The security administrator is responsible for the creation and distribution of the label_encodings file.
Some organizations have a government-furnished label_encodings file that is based on Defense Intelligence Agency (DIA) specifications. Other organizations might want to derive their encodings file from one of the files that are provided by Trusted Extensions.