In which scenario would Signal 22 be used?

Signal 22 is typically used for contacting District Headquarters (DHQ) in person. This code is part of a system that allows law enforcement officers to convey specific and critical information through a standardized communication method. When officers use Signal 22, they are signaling the need for direct communication with their command or district personnel, which is essential for operational coordination and support.

In the context of law enforcement communication and protocol, each signal serves a particular purpose to streamline responses and ensure clarity in various scenarios. The other options involve different types of requests or communications that do not specifically relate to contacting DHQ directly.