Sec. 6. (a) A person who drives a vehicle may overtake and pass upon the right of another vehicle only under the following conditions:
(1) When the vehicle overtaken is making or about to make a left turn.
(2) Upon a roadway with unobstructed pavement of sufficient width for two (2) or more lanes of vehicles moving lawfully in the direction being traveled by the overtaking vehicle.
(b) A person who drives a vehicle may overtake and pass another vehicle upon the right only under conditions that permit overtaking upon the right in safety. Overtaking upon the right may not be made by driving off the roadway.