Ind. Code § 24-5-27.5-22
(b) A financial services provider may decline or otherwise refuse to process a lawful payment card transaction involving a firearms retailer on the basis of the assignment or nonassignment of a firearms code:
(2) in accordance with:
(B) merchant category exclusions offered by a financial services provider for the purpose of expenditure control or corporate card control;
applicable to the payment card involved in the payment card transaction; or
As added by P.L.132-2024, SEC.4.