Cal. Bus. & Prof. Code § 7470.18
(a) It shall be an unfair practice for a TNC, an agent of a TNC, or a multicompany committee to do any of the following:
(4) Dominate or interfere with the formation, existence, or administration of any TNC driver organization, or contribute financial or other support to any such organization, whether directly or indirectly, unless required by this act or other law, by any regulations implementing this act or other law, or as a result of a sectoral agreement approved by the board, including, but not limited to, by doing any of the following:
(b) It shall be an unfair practice for a TNC driver organization or its agents to do any of the following:
(1) Restrain or coerce either of the following: