(a)Purpose. -- The purpose of this article is to ensure that a patient's right to self-determination in health care decisions be communicated and protected; and to set forth a process for private health care decision making for incapacitated adults, including the use of advance directives, which reduces the need for judicial involvement and defines the circumstances under which immunity shall be available for health care providers and surrogate decision makers who make health care decisions. The intent of the Legislature is to establish an effective method for private health care decision making for incapacitated adults, and to provide that the courts should not be the usual venue for making decisions. It is not the intent of the Legislature to legalize, condone, authorize or approve mercy killing or assisted suicide.