Which code indicates that an instruction should be disregarded?

The code that indicates an instruction should be disregarded is 10-22. This code is used to communicate that a previously issued order or instruction is no longer valid, allowing personnel to disregard it and avoid confusion or miscommunication. In operations involving communication protocols, particularly in emergency management or public service fields like those of the Valley Metro Light Rail, it is essential to have clear codes that can quickly convey important messages to personnel.

The other codes listed serve different purposes and do not indicate that an instruction should be disregarded, reinforcing the importance of understanding command structure and communication clarity in a public service environment.