Ind. Code § 26-1-2-209
(5) A party who has made a waiver affecting an executory portion of the contract may retract the waiver by reasonable notification received by the other party that strict performance will be required of any term waived, unless the retraction would be unjust in view of a material change of position in reliance on the waiver.
Formerly: Acts 1963, c.317, s.2-209. As amended by P.L.152-1986, SEC.128; P.L.199-2023, SEC.9.