Final answer:
If a customer is a Selectee under Secure Flight, they must be notified and subjected to additional security screening before boarding.
Step-by-step explanation:
Under the Secure Flight program, if a customer is identified as a Selectee on the flight manifest, specific protocols must be followed. The term Selectee refers to an individual who has been flagged for additional screening at the security checkpoints before boarding an aircraft. Airline personnel are required to notify the customer that they are a Selectee and ensure that they receive additional security screening. This will often involve a more thorough search of the individual's person and luggage, and possibly also a more comprehensive background check. Airlines must also indicate the Selectee status on the boarding pass. It is critical that airline and airport staff handle this process with professionalism to maintain the security of the flight while respecting the individual's rights.