Which of the following requires a CUA before usage?

The requirement for a Controlled Unclassified Access (CUA) before usage applies specifically to Sensitive Compartmented Information (SCI). SCI refers to classified information related to national security that requires special access controls and handling protocols due to its sensitivity. The CUA is a process that ensures only authorized personnel can access this information, aligning with stringent security measures necessary for protecting national interests.

In contrast, the other options, such as basic office supplies, phone and internet services, and general administrative tasks, do not require a CUA. These elements typically do not involve classified or sensitive information that necessitates elevated security clearance or access controls. Therefore, they are not subject to the same level of scrutiny as SCI, highlighting why a CUA is only mandated for certain types of sensitive information.