The form L train order is used for annulling an order and is the most
simply stated one of all.
For example, it might read--"Order No 15 is
Annulled." The order number must always be specified, and all crews holding
that particular one are to disregard its contents.
An annulling order
should not be delivered to a train not yet having the order which is
annulled by the form L. For example, suppose a crew receives an order that
annuls order 15, but order 15 has not yet been delivered to them. Confusion
The crew would rightfully want to see a copy of order 15 which
might supersede some instructions held in other orders.
FORMS S-M AND D-M
Both forms S-M and D-M train orders are used to annul part of an order:
form S-M for single track and D-M for double. The forms should be used only
when the part of the order not annulled is perfectly clear in its wording
after the annulled part is deleted. Two typical examples read:
That Part of Order No 14 Reading No 2 Meet No 1 at RK is Annulled
That Part of Order No 21 Reading No 17 Pass No 9 at FV Is Annulled
The form S-P train order is used to supersede an order or part of an
order simply by inserting the words "instead of."
An order cannot be
construed as superseding an order with which form S-P conflicts unless these
two words are added.
Once an order has been superseded, it cannot be
reissued under its original number.
Typical examples of the S-P order
No 1 Eng 9520 Meet No 18 Eng 9002 at FV Instead of RK
No 5 Eng 520 has Right Over No 6 Eng 313 WD to AY Instead of WD to LY
The form P train order serves the same purpose as form S-P: a part of an
order may be superseded without interfering with the remainder. Just as in
an S-P order, the keywords "instead of" must be used. The form P order is a
convenient type, because a dispatcher may use it to change even an engine
number by saying