47 CFR § 68.218 - Responsibility of the party acquiring equipment authorization.
(a) In acquiring approval for terminal equipment to be connected to the public switched telephone network, the responsible party warrants that each unit of equipment marketed under such authorization will comply with all applicable rules and regulations of this part and with the applicable technical criteria of the Administrative Council for Terminal Attachments.
(b) The responsible party or its agent shall provide the user of the approved terminal equipment the following:
(1) Consumer instructions required to be included with approved terminal equipment by the Administrative Council for Terminal Attachments;
(2) For a telephone that is not hearing aid-compatible, as defined in § 68.316 of these rules:
(i) Notice that FCC rules prohibit the use of that handset in certain locations; and
(ii) A list of such locations (see § 68.112).
(c) When approval is revoked for any item of equipment, the responsible party must take all reasonable steps to ensure that purchasers and users of such equipment are notified to discontinue use of such equipment.