Indiana Code Title 27. Insurance § 27-1-50-9

(1) A plan that applies one hundred percent (100%) of the rebates to reduce premiums for all covered individuals equally.

(2) A plan that calculates defined cost sharing for covered individuals of the plan sponsor at the point of sale based on a price that is reduced by an amount equal to at least eighty-five percent (85%) of all of the rebates received or estimated to be received by the insurer concerning the dispensing or administration of the prescription drug.