A train must not occupy DCS territory outside yard limits without which authority?

• A. Form D line 2 authority
• B. Timetable directive
• C. Radio permission
• D. Working clearance

Answer: (A)

Moving into DCS territory outside yard limits requires a formal authorization to protect the track occupancy. Form D line 2 authority is that written order, specifying the movement and the exact limits it covers, so the train can proceed with clear protection in place. Without this authority, entering the controlled area would be unsafe and not permitted.

Timetable directives govern general movement under the timetable but don’t grant the specific protection needed to occupy DCS territory beyond yard limits. Radio permission, while it may convey approval, does not replace a formal written authority required by NORAC. A working clearance is intended for crews performing track work, not for routine train movements into DCS territory, so it doesn’t apply here.