Which document can designate the limits of Form D authority?

Which document can designate the limits of Form D authority?

• A. Station names or Whole mile post numbers
• B. Timetable
• C. Form D Line 6
• D. Bulletin Order

Answer: (A)

Form D authority is bounded by precise track location references so everyone knows exactly where the permission applies. The limits are designated using station names or whole milepost numbers, which pin down the start and end points of the authorized movement. A timetable covers general rules for a broader area, not the specific Form D boundary. Bulletin Orders can change conditions but don’t define the authority’s limits. And while Form D itself contains the instructions for movement, the explicit limits are identified with those location markers (station names or mileposts). That’s why station names or milepost numbers are the document type used to designate the limits.

Form D authority is bounded by precise track location references so everyone knows exactly where the permission applies. The limits are designated using station names or whole milepost numbers, which pin down the start and end points of the authorized movement. A timetable covers general rules for a broader area, not the specific Form D boundary. Bulletin Orders can change conditions but don’t define the authority’s limits. And while Form D itself contains the instructions for movement, the explicit limits are identified with those location markers (station names or mileposts). That’s why station names or milepost numbers are the document type used to designate the limits.