In which scenario would DD Form 1610 be used?

DD Form 1610 is specifically utilized for the authorization of temporary duty (TDY) travel for Department of Defense (DOD) personnel. This form is essential in facilitating the official travel of military members and associated personnel when they are ordered to perform duties away from their permanent duty station. The form collects important details, such as the purpose of travel, duration, and funding information, ensuring that all travel arrangements adhere to military regulations and budget considerations.

In the context of the question, other scenarios listed do not pertain directly to this particular form. For instance, personal leave requests would involve different forms and processes. Authorization of travel for civilian personnel typically requires different paperwork tailored to non-military staff. Similarly, filing for military retirement involves a separate set of forms focused on the retirement process itself. Thus, the use of DD Form 1610 is clearly designated for temporary duty travel, making it the correct answer.