Which document governs where Cab Signal System (CSS) rules apply?

Which document governs where Cab Signal System (CSS) rules apply?

• A. Timetable or Bulletin Order
• B. Safety Notice
• C. Engineer’s Manual
• D. Local Procedures

Answer: (A)

The document that governs where CSS rules apply is the timetable or bulletin order. This is the controlling reference that specifies the territory, subdivisions, and conditions under which cab signal system rules are in effect. Safety Notices and Local Procedures provide supplemental or site-specific information, but they do not determine the geographic or operational scope of CSS rules. The Engineer’s Manual covers general instructions and rule interpretations, not the specific applicability. So the timetable or bulletin order sets exactly where CSS rules must be followed.

The document that governs where CSS rules apply is the timetable or bulletin order. This is the controlling reference that specifies the territory, subdivisions, and conditions under which cab signal system rules are in effect. Safety Notices and Local Procedures provide supplemental or site-specific information, but they do not determine the geographic or operational scope of CSS rules. The Engineer’s Manual covers general instructions and rule interpretations, not the specific applicability. So the timetable or bulletin order sets exactly where CSS rules must be followed.