PROBATE CODE
SECTION 4665




4665.  Except as otherwise provided by statute:
   (a) On and after July 1, 2000, this division applies to all
advance health care directives, including, but not limited to,
durable powers of attorney for health care and declarations under the
Natural Death Act (former Chapter 3.9 (commencing with Section 7185)
of Part 1 of Division 7 of the Health and Safety Code), regardless
of whether they were given or executed before, on, or after July 1,
2000.
   (b) This division applies to all proceedings concerning advance
health care directives commenced on or after July 1, 2000.
   (c) This division applies to all proceedings concerning written
advance health care directives commenced before July 1, 2000, unless
the court determines that application of a particular provision of
this division would substantially interfere with the effective
conduct of the proceedings or the rights of the parties and other
interested persons, in which case the particular provision of this
division does not apply and prior law applies.
   (d) Nothing in this division affects the validity of an advance
health care directive executed before July 1, 2000, that was valid
under prior law.
   (e) Nothing in this division affects the validity of a durable
power of attorney for health care executed on a printed form that was
valid under prior law, regardless of whether execution occurred
before, on, or after July 1, 2000.