Safeguard measures duration limits constrain imposition, allow a single extension, and restrict prompt reapplication of measures. Safeguard measures and suspension of concessions are time limited to what is necessary to prevent or remedy serious injury and to facilitate adjustment; measures cease after an initial limited period, may be extended once on Director General recommendation but cannot exceed the overall maximum aggregate duration. The transition period for a good terminates any safeguard for that good. Reapplication is restricted by a non application interval at least equal to prior application, with a specific short duration exception permitting limited reapplication subject to lapse and frequency conditions.