Cal. Bus. & Prof. Code § 17539.5
(a) For purposes of this section and Sections 17539.55 and 17539.6:
(b) It is unlawful for any person to engage in any of the following acts in order to encourage any caller to utilize an information-access service:
(c) It is unlawful for any person to solicit or sell an information-access service unless the following information is clearly and conspicuously disclosed in all solicitations:
(3) The cost of the call, which shall be disclosed as follows:
(B) If the call is billed on a usage-sensitive basis, the cost per minute or other unit of time, and including:
(h) It is unlawful for any person to solicit or sell an information-access service to any person in the following manner:
(1) The solicitation offers to persons in this state who respond to the solicitation by calling a 900 number any incentive that:
(B) Requires the recipient to purchase goods or services from any third party in order to utilize the incentive unless: