As of 2015, a TSA Pre Check Known Traveller Number application is responded to within two to three weeks. TSA Pre Check is a program for low-risk travellers that allows them to avoid removing shoes, laptops, liquids, and belts when being screened at TSA checkpoints for certain airlines and airports.
Applications for TSA Pre Check can be submitted through the TSA Pre Check Application Program, Global Entry, NEXUS or SENTRI. It is available at selected airports for both domestic and international travel, and a TSA Pre Check symbol is printed directly on boarding passes for eligible travellers.
There is no age limit for the TSA Pre Check program, and family members 12 and under may accompany an eligible adult through the expedited security line.