B&O/C&O Operating Rules - Manual Block Rules
CLEARANCE FORM "A" OPERATION
S-241. On subdivisions specified by special
instructions, Clearance Form A will authorize a designated train to occupy
one or more subdivisions without protecting against other trains. More
than one train will not be authorized by Clearance Form A to occupy the
same subdivision at the same time. When more than one train is to be authorized,
train orders will be used and Rule 91 will apply, except the occupied subdivisions
may be entered in emergency under flag protection on authority of Train
Dispatcher.
Clearance Form A authority to occupy a subdivision
remains in effect until the Conductor reports the train clear of the subdivision
or the Clearance Form A authority is annulled.
