The KCM checkpoint has no such requirement. Here's what it says:

"Access

Crewmembers can utilize the KCM access points for both business and personal use. TSA Officers do not make a determination as to whether a crewmember is on active duty for a flight, traveling for business, or traveling for personal reasons. TSA Officers should not ask crewmembers their reason for using KCM. Crewmembers must have the required identification to use KCM. The crewmember’s airline also must participate in KCM in order to be eligible."