California Code, Welfare and Institutions Code - WIC § 4643

(a) If assessment is needed, the assessment shall be performed within 120 days following initial intake. Assessment shall be performed as soon as possible and in no event more than 60 days following initial intake where any delay would expose the client to unnecessary risk to his or her health and safety or to significant further delay in mental or physical development, or the client would be at imminent risk of placement in a more restrictive environment. Assessment may include collection and review of available historical diagnostic data, provision or procurement of necessary tests and evaluations, and summarization of developmental levels and service needs and is conditional upon receipt of the release of information specified in subdivision (b).

(b) In determining if an individual meets the definition of developmental disability contained in subdivision (a) of Section 4512, the regional center may consider evaluations and tests, including, but not limited to, intelligence tests, adaptive functioning tests, neurological and neuropsychological tests, diagnostic tests performed by a physician, psychiatric tests, and other tests or evaluations that have been performed by, and are available from, other sources.

(c) At the time of assessment, the individual, or, where appropriate, the parents, legal guardian, or conservator, shall provide copies of any health benefit cards under which the consumer is eligible to receive health benefits, including, but not limited to, private health insurance, a health care service plan, Medi-Cal, Medicare, and TRICARE. If the individual, or where appropriate, the parents, legal guardians, or conservators, have no such benefits, the regional center shall not use that fact to negatively impact the services that the individual may or may not receive from the regional center.

(d) A regional center shall communicate with the consumer and his or her family pursuant to this section in their native language, including providing alternative communication services, as required by Sections 11135 to 11139.7, inclusive, of the Government Code and implementing regulations.