Before looking at Reg CC, there's a requirement in Reg E for the owner of an ATM that charges cardholders of other banks a fee for completing a transaction (or a balance inquiry) at the ATM. The ATM owner is required to disclose the amount of the fee before the cardholder commits to the transaction. And if your bank charges its customers for transactions made at other banks' ATMs, that fee must be disclosed in your EFT account disclosures.
Under Reg CC section 229.19, funds deposited at an ATM that is not on, or within 50 feet of, the premises of the depositary bank are considered deposited on the day the funds are removed from the ATM, if funds normally are removed from the ATM not more than two times each week.
If the bank has a cut-off hour for ATM deposits that is different from its cut-off hour for deposits made at branch offices, the ATM cut-off hour needs to be disclosed in the bank's Funds Availability Policy disclosure.
If your bank makes funds from deposits made at non-proprietary ATMs available later than deposits made at your bank's ATMs, you have to disclose to your customers how to distinguish between your bank's machines and non-proprietary machines.