In a Track Authority in CTC Territory that includes SW-Y at the entrance, what further authority is required to enter the limits?

• A. No further authority
• B. Verbal authority from the control operator to enter the limits
• C. Written permission
• D. A flag signal

Answer: (A)

In CTC Territory, movement is governed by a Track Authority that defines exactly where you may operate and under what conditions. If that authority explicitly includes the entrance switch SW-Y, you already have permission to enter the limits; no additional authorization is needed. You must, of course, follow all terms of the authority—speed restrictions, interlocking and switch positions, and any signals or occupancy conditions. The idea is that the Track Authority itself is the controlling document for entry, so extra verbal, written, or flag permissions aren’t required when the entrance is covered by the TA. If the entrance weren’t included, then another form of authorization would be necessary.