Mandatory Signs
Mandatory sign means a sign requiring specific behaviour.
CY-BAL
HEAR-BAL
HVJ-BAL
KL-BAL
LC-SAL
PC-BAL
PGO-BAL
PG-BAL
RP-BAL
SB-SAL
SC-SAL
SHAR-BAL
SHEL-BAL
WRP-BAL
WUSB-BAL
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