Effective Practices. Plans to conclude a lockdown will vary by location. Procedures may include a general announcement via the PA system by the principal, or a room-to-room visit from police/school administration, with some sort of an identification process, so that the occupants of a locked room know that whoever is giving them the all- clear is in fact authentic. Local plans should include procedures for ending lockdowns at off-site evacuation locations. In all cases where police have responded, plans should clearly indicate that the decision to end a lockdown shall be made only after approval of the on-scene police incident commander.
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