331.04  OVERTAKING, PASSING TO RIGHT OF VEHICLE.
   (a)   The driver of a vehicle may overtake and pass on the right of another vehicle only under the following conditions:
      (1)   When the vehicle overtaken is making or about to make a left turn; or
      (2)   Upon a roadway with unobstructed pavement of sufficient width for two or more lines of vehicles moving lawfully in the direction being traveled by the overtaking vehicle.
   (b)   The driver of a vehicle may overtake and pass another vehicle only under conditions permitting the movement in safety.  The movement shall not be made by driving off the roadway.
(ORC 4511.28)
Penalty - see Sections 307.01 and 307.02