What is the permissible use of debit cards by units?

The permissible use of debit cards by units primarily revolves around the following aspects: they are designed to ensure that transactions are controlled and that funds are appropriately allocated for necessary expenses. The correct answer highlights that debit cards can be used for deposits, which aligns with the functional purpose of managing unit funds.

By allowing deposits, debit cards provide a mechanism to securely place funds into an account without excess risk. This controlled usage helps maintain budgetary compliance, as units are accountable for the funds they manage and must ensure their proper handling. When only permitting deposits, it effectively reduces the potential for misuse associated with spending and purchase activities, allowing units to maintain oversight on their available financial resources.

This understanding reflects the nature of cash management practices within military units, where funds must be carefully tracked and utilized within specific guidelines to ensure financial discipline and accountability. Other options may suggest broader use cases for debit cards that could introduce challenges in fund management and oversight.