Children aged 12 or below can accompany their parents or guardian who have enrolled with TSA to the TSA lanes provided they are in the same reservation. For children aged 13-17, the rule varies a little. They cannot avail expedited screening when traveling all by themselves or without a parent or guardian enrolled for TSA.  The TSA logo will appear on their pass if the parent or guardian accompanying them is TSA enrolled.  Adults with gate passes accompanying children traveling solo, must go through standard screening even if they are TSA-enrolled. This is because TSA PreCheck facilities aren’t applicable for gate passes.