Final answer:
When labeling RTE TCS food to be held for longer than 24 hours, the additional information that should be included is the use-by date.
Step-by-step explanation:
When labeling RTE TCS (Ready-to-Eat, Time/Temperature Control for Safety) food to be held for longer than 24 hours, the additional information that should be included is the use-by date. This is the date by which the food should be consumed for optimal quality and safety. It helps to ensure that the food is used within a specific timeframe to minimize the risk of bacterial growth or spoilage.