California Code, Civil Code - CIV § 1749.45

(a) As used in this title, “gift certificate” includes gift cards and electronic gift cards, but does not include any gift card usable with multiple sellers of goods or services, provided the expiration date, if any, is printed on the card.  This exemption does not apply to a gift card usable only with affiliated sellers of goods or services.

(b) Nothing in this title prohibits those fees or practices expressly permitted by Section 17538.9 of the Business and Professions Code with respect to a prepaid calling card, as defined in that section, that is issued solely to provide an access number and authorization code for prepaid calling services.