Cal. Bus. & Prof. Code § 23355.3

(a) A licensee may sponsor or otherwise participate in an event conducted by, and for the benefit of, a nonprofit organization in which retail and nonretail licensees are involved as sponsors or participants, subject to all of the following conditions:
1. (1) Except as otherwise provided in this section, any payment of money or other consideration for sponsorship or participation in the event shall be made only to the nonprofit organization conducting the event.
2. (2) Except as otherwise provided in this section, a nonretail licensee shall not, directly or indirectly, pay money or provide any other thing of value to a permanent retail licensee that is also a sponsor of, or participant in, the event.
3. (3) A nonretail licensee may donate alcoholic beverages to a nonprofit only as otherwise authorized by Section 25503.9.
4. (4) Except as otherwise provided by this division, a retail licensee shall not give, sell, or furnish any alcoholic beverages to the temporary licensee.
5. (5) A nonretail or retail licensee may choose to participate in any level of sponsorship, including at the name or principal sponsor level. A nonprofit organization may choose to have one, or multiple, name or principal sponsors.
6. (6)
  1. (A) A nonretail licensee may advertise or communicate sponsorship or participation in the event. This advertising or communication may include, but is not limited to, sharing, reposting, or otherwise forwarding a social media post by a permanent retail licensee or a nonretail licensee if the advertisement or communication does not contain the retail price of any alcoholic beverage or otherwise promotes a retail licensee beyond its sponsorship or participation in the event.
  2. (B) A nonretail licensee shall not pay or reimburse a permanent licensee, directly or indirectly, for any advertising services, including by way of social media. Except as otherwise permitted by this section, a permanent retail licensee shall not accept any payment or reimbursement, directly or indirectly, for any advertising services offered by a nonretail licensee.
  3. (C) For the purposes of this subdivision, “social media” means a service, platform, application, or site where users communicate and share media, such as pictures, videos, music, and blogs, with other users.
7. (7) A nonretail licensee shall not require, directly or indirectly, as a condition of sponsorship or participation in any event under this section, that its products be sold or served exclusively at the event. A nonretail licensee shall not receive, directly or indirectly, any advertising, sale, or promotional benefit from any permanent retail licensee in connection with the sponsorship or participation. A permanent retail licensee shall not offer or provide a nonretail licensee any advertising, sale, or promotional benefit in connection with the sponsorship or participation.
(b) This section does not authorize a nonretail licensee to pay, in whole or in part, any costs, including the cost of sponsorship, of any retail licensee that is sponsoring or participating in a nonprofit event.
(c) A licensee that sponsors or participates in a nonprofit event under this section shall keep detailed records of its sponsorship or participation and shall maintain those records for a period of at least three years. These records shall be provided to the department upon request.
(d) Nothing in this section shall be deemed to exempt the nonprofit organization from obtaining any licenses or permits as may be required to conduct the event.