Description: Every element that matches this policy's filter and is therefore under control of this policy will have this policy's action executed periodically to ensure that the element remains in the state dictated by the policy. This object lets the manager control the maximum amount of time that may pass before an element has the action run on it.

In other words, in any given interval of this duration, all elements under control of this policy must have the action run on them. Note that it is an implementation-dependent matter as to how the policy agent schedules the policy action on various elements within this interval.