Some policies must be scheduled before they can be enforced.
If you enable a policy, but do not schedule it, it will be activated according to the schedule currently specified in the Default Package Schedule.
The Default Package Schedule provides a default for scheduled policies. The default schedule is Run At System Startup.
The order of enforcement of different server policies is not guaranteed if the policies use exactly the same schedule. In other words, you should stagger the policies' schedules if you want to ensure the order they are enforced.
For information on scheduling policies, see Scheduling Policies.
For information on policies, see Server Policies.