What is a key element included in the required duty items?

A current badge is a crucial item in a flight attendant's required duty list because it serves as a form of identification and proof of the flight attendant's employment with the airline. The badge allows for proper access to secure areas within the airport and proper identification to passengers and crew members. It is essential for maintaining safety and security in the aviation environment.

While an extra uniform, personal smartphone, and snacks for passengers can be part of a flight attendant's preparation for a shift, they do not hold the same necessity for operational compliance and security as the current badge. The badge is a requisite for performing the duties of a flight attendant and adhering to airline protocols.