Form D cancellation information Track is clear information Additional Line 2 authorities Additional Line 3 authorities
- Form Ds can be cancelled.
- Track clear information (Rule 805) when no trains or TCs ahead NONE must be written on line 3.
- Line 2 (Rule 400c Occupying DCS territory) Specified directions can be added to Form Ds in effect.
- Line 3 (Rule 804) Dispatcher may direct addressees to add additional Line 2 authorities to a specified direction Form D which is still in effect.