When is a use status deemed allowable?

A use status is deemed allowable when it is permitted following proper authorization, which is the essence of choice B. This implies that there are established protocols or guidelines that must be adhered to in order for a specific use to be approved. Authorization generally ensures that the use complies with relevant laws, regulations, standards, or policies, thereby confirming that it has been reviewed for safety, legality, and appropriateness before it can proceed.

In the context of how use statuses are regulated, it's important to note that while there are scenarios where other considerations such as mitigation (choice C) or strict regulations (choice D) may apply, the foundational requirement of obtaining proper authorization serves as a prerequisite that must be satisfied. Furthermore, the concept of always being allowed without conditions (choice A) lacks the necessary safeguards that ensure responsible use; thus, it does not reflect the typical approach taken in regulatory frameworks.