When necessary to space trains in this manner the time
the following train win be permitted to proceed must
be shown on the clearance form in the space provided
for that purpose. The conductor and engineman must
respect that time.
Rule 223. Signal; Abbreviations. The following signals and
abbreviations may be used in train orders:
Initials for the signature of the chief train
Such office and other signals as are authorized.
The usual abbreviations for the names of the months
C&EConductor and engineman.
MPHMiles per hour.