Cal. Civ. Proc. Code § 170.9
(b) This section shall not prohibit or limit the following:
(c) For purposes of this section, “judge” includes all of the following:
(e) Payments, advances, or reimbursements for travel, including actual transportation and related lodging and subsistence that is reasonably related to a judicial or governmental purpose, or to an issue of state, national, or international public policy, are not prohibited or limited by this section if any of the following apply:
(2) The travel is provided by a government, a governmental agency or authority, a foreign government, a foreign bar association, an international service organization, a bona fide public or private educational institution, as defined in Section 203 of the Revenue and Taxation Code, or a nonprofit charitable or religious organization that is exempt from taxation under Section 501(c)(3) of the Internal Revenue Code, or by a person domiciled outside the United States who substantially satisfies the requirements for tax-exempt status under Section 501(c)(3) of the Internal Revenue Code.
For purposes of this section, “foreign bar association” means an association of attorneys located outside the United States (A) that performs functions substantially equivalent to those performed by state or local bar associations in this state and (B) that permits membership by attorneys in that country representing various legal specialties and does not limit membership to attorneys generally representing one side or another in litigation. “International service organization” means a bona fide international service organization of which the judge is a member. A judge who accepts travel payments from an international service organization pursuant to this subdivision shall not preside over or participate in decisions affecting that organization, its state or local chapters, or its local members.
(i) “Honorarium” does not include earned income for personal services that are customarily provided in connection with the practice of a bona fide business, trade, or profession, such as teaching or writing for a publisher, and does not include fees or other things of value received pursuant to Section 94.5 of the Penal Code for performance of a marriage.
For purposes of this section, “teaching” shall include presentations to impart educational information to lawyers in events qualifying for credit under mandatory continuing legal education, to students in bona fide educational institutions, and to associations or groups of judges.
(l) “Gift” means a payment to the extent that consideration of equal or greater value is not received and includes a rebate or discount in the price of anything of value unless the rebate or discount is made in the regular course of business to members of the public without regard to official status. A person, other than a defendant in a criminal action, who claims that a payment is not a gift by reason of receipt of consideration has the burden of proving that the consideration received is of equal or greater value. However, the term “gift” does not include any of the following: