California Code, Welfare and Institutions Code - WIC § 4502.1

(a) The right of individuals with developmental disabilities to make choices in their own lives requires that all public or private agencies receiving state funds for the purpose of serving persons with developmental disabilities, including, but not limited to, regional centers, shall respect the choices made by a consumer or, if appropriate, the consumer's parents, legal guardian, conservator, or authorized representative. Those public or private agencies shall provide consumers with opportunities to exercise decisionmaking skills in any aspect of day-to-day living and shall provide consumers with relevant information in an understandable form to aid the consumer in making his or her choice.

(b) A regional center shall provide information in a manner that is culturally and linguistically appropriate for the consumer, or, when appropriate, the consumer's parents, legal guardian, conservator, or authorized representative, including providing alternative communication services, as required by Article 9.5 (commencing with Section 11135) of Chapter 1 of Part 1 of Division 3 of Title 2 of the Government Code and the regulations implementing that article.