Which of the following is NOT a requirement for tour guides in New Orleans?

The correct answer indicates that extensive historical knowledge is not a formal requirement for tour guides in New Orleans. While having a strong understanding of the city's history, culture, and attractions can greatly enhance the quality of a tour, it is not mandated by law or regulation.

Tour guides are, however, required to possess a tour guide license, which ensures they have met specific criteria set by the city. Displaying company identification is also essential, as it helps establish professionalism and credibility while allowing tourists to easily identify their guides. Additionally, concluding tours at a specific time may be a guideline set by the tour company to ensure schedules are maintained, although exact timing might not be strictly enforced by regulations.

Overall, the requirement for knowledgeable guides is encouraged, but not legally enforced, making this the distinguishing factor in the provided options.