The CLS (Classification) field has changed to identify those flight attendants that have been awarded this flight leg as their Primary Line (PRI). Those who have PRI in the CLS field are the owners of the position. All others (B/H, RSV) have picked up the trip from Secondary Lines, the Bid Sheet, or Daily Crew Scheduling and the position is a “Place holder” only. All position other than PRI will be determined on the aircraft or in the preflight briefing in seniority order.