On a system with the Trusted Extensions feature of Oracle Solaris enabled, labels are used to control access to information. This book is for security administrators, whose responsibilities include planning their organizations' labels and implementing the organizations' label_encodings file. This book is used with the Compartmented Mode Workstation Labeling: Encodings Format guide. The Encodings book has advanced instructions on labels. This book describes which parts of the Encodings book do not apply to the Trusted Extensions implementation.