Ind. Code § 28-8-1-3

Sec. 3. In the event the stock of a bank service corporation is held by two (2) banks or trust companies, one (1) of the banks or trust companies ceases to use the services of the bank service corporation and ceases to hold stock in such corporation thereby leaving the other bank or trust company the sole stockholder in such corporation, the bank service corporation may continue to function as such and the remaining bank may continue to hold stock in such corporation.