- A service book must be maintained for every government servant from their first appointment to retirement. It contains personal, educational, and service details and is updated each time the employee's status changes. - The service book is maintained in duplicate, with one copy kept by the Head of Office and one given to the employee. Entries must be properly attested. - The service book precisely records all periods of service, leave, suspensions, trainings, foreign service, and other interrupts to allow for accurate pension calculation at retirement. It is an important legal record of the employee's entire career history with the government.