What two elements must be included in every "AM" message directed to a Canadian agency?

In an "AM" message directed to a Canadian agency, the inclusion of both the reason and the requestor is essential for effective communication. The reason provides the rationale behind the message, helping the Canadian agency understand the context and urgency of the communication. This ensures that the message is received with the appropriate level of importance and enables the agency to respond adequately.

The requestor identifies who is initiating the communication, establishing a point of contact for any follow-up or inquiries. This is crucial in a law enforcement context where clarity and accountability are vital, as the agency can reach out to the requestor for further information or to clarify any details regarding the information being shared.

The other options, while they may include elements of communication, do not encapsulate the specific requirements for an "AM" message directed to a Canadian agency related to law enforcement and investigative communication protocols.