Iowa Code § 727.7: Publication required.

Every telephone company doing business in this state shall print a copy of sections 727.5 and 727.6 in a prominent place in every telephone directory published by it. Any person, firm, or corporation providing telephone service which distributes or causes to be distributed in this state copies of a telephone directory which is subject to the provisions of this section which does not contain the notice herein provided for commits a simple misdemeanor.