(a) A telephone directory distributed to the public in this state that lists the telephone numbers of an exchange located in this state must contain a notice explaining the offenses under Sections 186.042 and 186.043. The notice must be:
(1) printed in type not smaller than the smallest type on the same page; and
(2) preceded by the word “warning” printed in type at least as large as the largest type on the same page.
(b) At least once each year, a person providing telephone service shall enclose in the telephone bill mailed to each person who uses a party line telephone a notice of Sections 186.042 and 186.043.

(c) This section does not apply to a directory, commonly known as a classified directory, that is distributed solely for business advertising purposes.