Which of the following statements about Indiana's speed limits is FALSE?

You are required to keep up with the flow of traffic but not exceed the maximum speed limit [9-21-5-7]. Although the minimum posted speed limit is enforceable, you may drive slower when forced to do so by another law or a safety issue such as fog, heavy rain, or heavy traffic [9-21-5-8]. Hence, you must drive at a reduced speed when conditions require it, regardless of the posted speed limit. You would be expected to slow down for a winding road, the crest of a steep hill, heavy rain, or fog. [9-21-5-4]. Vehicles that are traveling slower than the flow of traffic should stay in the right lane [9-21-5-9]. [IC 9-21-5, Indiana Code]