47 CFR §64.4006
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
A carrier that receives customer account information under this section shall use such information to ensure timely and accurate billing of a customer's account and to ensure timely and accurate execution of a customer's preferred interexchange carrier instructions. Such information shall not be used for marketing purposes without the express consent of the customer.