(1) The provisions of the declarant's most recent declaration shall prevail over any other document executed by the declarant concerning any preferences described in KRS 367.93105.
(2) The invalidity of any specific preference or direction shall not affect the validity of the declaration.
(3) This section shall not be construed to enable a legal representative to revoke a properly executed declaration or to invalidate a properly executed power of attorney with respect to any power or duty belonging to the legal representative that is not related to the declaration.