It's at 1026.7(b)(11):
"(11) Due date; late payment costs. (i) Except as provided in paragraph (b)(11)(ii) of this section and in accordance with the format requirements in paragraph (b)(13) of this section, for a credit card account under an open-end (not home-secured) consumer credit plan, a card issuer must provide on each periodic statement:
(A) The due date for a payment. The due date disclosed pursuant to this paragraph shall be the same day of the month for each billing cycle."
And the Commentary at 1026.7(b)(11)(7) says:
"7. Change in due date. A creditor may adjust a consumer's due date from time to time provided that the new due date will be the same numerical date each month on an ongoing basis. For example, a creditor may choose to honor a consumer's request to change from a due date that is the 20th of each month to the 5th of each month, or may choose to change a consumer's due date from time to time for operational reasons. See comment 2(a)(4)–3 for guidance on transitional billing cycles."
which would appear to mean that a creditor can change the due date if necessary for purchased accounts due to system limitations.
It doesn't appear to me that this change falls under the definition of a "significant change in account terms," though, so I'm struggling with the notification requirements. Does the accountholder have the right to opt out of the change?
Thanks so much for your help. (I was with a bank that didn't have credit cards for many years and recently joined a bank that does, so I'm still learning the credit card provisions.)