N.C. Gen. Stat. § 62-54
The Commission shall require each local exchange company and each competing local provider certified to do business in North Carolina to notify all telephone subscribers who subscribe to residential service from that company of the provisions of Article 4 of Chapter 75 of the General Statutes and of the federal laws and regulations allowing consumers to object to receiving telephone solicitations. The notification shall be drafted pursuant to G.S. 75-102(m), shall be distributed at least annually, and shall be distributed by one of the following methods: bill insert or bill message, direct mail, or e-mail when the subscriber has affirmatively selected e-mail as a means of notification. The Commission shall also ensure that this information is printed in a clear, conspicuous manner in the consumer information pages of each telephone directory distributed to residential customers.
N.C. Gen. Stat. § 62-54