Section 810 Of Part 17. Legal Mental Capacity From California Probate Code >> Division 2. >> Part 17.
810
. The Legislature finds and declares the following:
(a) For purposes of this part, there shall exist a rebuttable
presumption affecting the burden of proof that all persons have the
capacity to make decisions and to be responsible for their acts or
decisions.
(b) A person who has a mental or physical disorder may still be
capable of contracting, conveying, marrying, making medical
decisions, executing wills or trusts, and performing other actions.
(c) A judicial determination that a person is totally without
understanding, or is of unsound mind, or suffers from one or more
mental deficits so substantial that, under the circumstances, the
person should be deemed to lack the legal capacity to perform a
specific act, should be based on evidence of a deficit in one or more
of the person's mental functions rather than on a diagnosis of a
person's mental or physical disorder.