Mandatory directives are composed of authorities and speed restrictions. Which of the following is an example of an authority?

• A. Track warrants
• B. Speed restrictions
• C. Track and time
• D. Track permits

Answer: (A)

In Track Warrant Control, a mandatory directive has two parts: an authority and speed restrictions. The authority is the permission to occupy or move on a specific portion of track, granted by the dispatcher. The instrument that provides that permission is a track warrant, which explicitly authorizes the movement over a defined route or track segment. Speed restrictions are separate limits that must be followed within that authority, specifying how fast you may travel.

So, the example of the authority is track warrants—the formal authorization to proceed on the designated track. The other options describe speed rules or other documents that do not themselves grant the movement right as the authority.