Final answer:
The NDEA is responsible for authorizing and validating the expenses incurred by the traveler on travel vouchers. They ensure that the financial aspects comply with the organization's travel policy and that the claimed expenses are accurate and appropriate.
Step-by-step explanation:
When signing travel vouchers on behalf of the traveler, the NDEA (Non-Direct Entry Agent) must authorize and validate the expenses incurred. This process includes verifying the accuracy and appropriateness of the expenses charged during the trip, ensuring they align with the organization's policies and the travel authorization. This means that they need to check all receipts and other documentation to ensure that the traveler is not claiming for expenses that are not allowed or outside the scope of the official travel.
The other options, such as verifying the traveler's itinerary, ensuring vaccination status, or confirming dietary preferences, may be part of the travel arrangement process, but they do not typically fall under the responsibility of the NDEA when it comes to signing off on travel vouchers. The main focus for the NDEA should be the financial aspect and compliance with the travel policy when reviewing and signing vouchers.