Your difficulty in finding respondents may be in that you are looking for laws or regulations to direct your actions when none exist for most of them. Just some observations:
* "Charging a fee for not having e statements" might be a bit easier to understand if you changed it to charging a fee for receiving a paper statement. That has become commonplace; i.e. if customers want a paper statement, they pay for it. If this is a new fee not mentioned in the customer's TISA disclosure at account inception then you would give 30 days advance notice to all affected account holders.
* You may offer incentives on some account types but not others as you see fit.
* You may discriminate and not send all owners of the account type notice of the incentive, but it's difficult to imagine why...
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.