California Code, Probate Code - PROB § 1801

(a) A conservator of the person may be appointed for a person who is unable to provide properly for his or her personal needs for physical health, food, clothing, or shelter, except as provided for the person as described in subdivision (b) or (c) of Section 1828.5.

(b) A conservator of the estate may be appointed for a person who is substantially unable to manage his or her own financial resources or resist fraud or undue influence, except as provided for that person as described in subdivision (b) or (c) of Section 1828.5. Substantial inability may not be proved solely by isolated incidents of negligence or improvidence.

(c) A conservator of the person and estate may be appointed for a person described in subdivisions (a) and (b).

(d) A limited conservator of the person or of the estate, or both, may be appointed for a developmentally disabled adult. A limited conservatorship may be utilized only as necessary to promote and protect the well-being of the individual, shall be designed to encourage the development of maximum self-reliance and independence of the individual, and shall be ordered only to the extent necessitated by the individual's proven mental and adaptive limitations. The conservatee of the limited conservator shall not be presumed to be incompetent and shall retain all legal and civil rights except those which by court order have been designated as legal disabilities and have been specifically granted to the limited conservator. The intent of the Legislature, as expressed in Section 4501 of the Welfare and Institutions Code, that developmentally disabled citizens of this state receive services resulting in more independent, productive, and normal lives is the underlying mandate of this division in its application to adults alleged to be developmentally disabled.

(e) The standard of proof for the appointment of a conservator pursuant to this section shall be clear and convincing evidence.