52.4-B2e)    Supporting Conductors of 7500-21,000 Volts on the Same Structure With Conductors of 750 Volts or Less:  Where, on the same structures in rural districts, crossarms supporting conductors of 7500-21,000 volts are above conductors of 750 volts or less, the crossarm supporting conductors of 7500-20,000 next above the conductors of 750 volts or less shall be marked as high voltage.  All crossarms supporting conductors of 7500-21,000 volts on the same structures shall be marked as high voltage.

Strikeout and Underline Version
Rule 52.4-B2e

52.4-B2e)    Supporting Conductors of 7500-21,000 22,500 Volts on the Same Structure With Conductors of 750 Volts or Less:  Where, on the same structures in rural districts, crossarms supporting conductors of 7500-21,00022,500  volts are above conductors of 750 volts or less, the crossarm supporting conductors of 7500-21,00022,500  next above the conductors of 750 volts or less shall be marked as high voltage.  All crossarms supporting conductors of 7500-21,00022,500 volts on the same structures shall be marked as high voltage.

52.4-B2e)    Supporting Conductors of 7500-22,500 Volts on the Same Structure With Conductors of 750 Volts or Less:  Where, on the same structures in rural districts, crossarms supporting conductors of 7500-22,500 volts are above conductors of 750 volts or less, the crossarm supporting conductors of 7500-22,500 next above the conductors of 750 volts or less shall be marked as high voltage.  All crossarms supporting conductors of 7500-22,500 volts on the same structures shall be marked as high voltage.