Where can sworn personnel find the official meanings and usage rules for 400-series codes?

• A. In the agency's code book or communications manual.
• B. In the dispatch radio frequency list.
• C. In the daily briefing notes.
• D. In the patrol uniforms guidelines.

Answer: (A)

Official meanings and usage rules for 400-series codes are documented in the agency's code book or communications manual. These resources are the authoritative reference that defines what each code stands for and how it should be used during radio or other communications, ensuring consistency and reducing miscommunication across units. They’re maintained by the department’s communications or training staff and updated as codes evolve, with officers trained to consult them in day-to-day operations.

Other options don’t fit because a dispatch radio frequency list is about the technical channels used for communication, not what the codes mean. Daily briefing notes may include reminders or updates, but they aren’t the official reference for code definitions. Patrol uniforms guidelines cover appearance and equipment standards, not coding meanings.