Although Dean has a valid technical point, you can take some comfort from the fact that no one is likely to "ding" you if you, as the acquiring bank, make these disclosures.
Although there may not be a requirement to alert customers on the OD Privilege product, you should send out that alert, I believe.
As for the Reg E and Reg CC change notices, I encourage you to send them out as well. The change notice requirements here have some teeth, and you owe the information to these people, anyhow.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8