How many operating companies must be present for command to consider adding a command officer to any sector?

The correct answer is based on the guidelines established in the Phoenix Standard Operating Procedures, which specify that command will consider adding a command officer to any sector only when there are three operating companies present. This requirement ensures that the sector is sufficiently staffed to require additional oversight and coordination. The presence of three operating companies signifies a level of operational complexity that justifies the need for a command officer to manage resources effectively and ensure effective communication and decision-making during incidents. This structure is crucial in maintaining safety, efficiency, and command integrity in dynamic operational environments.