(c) For purposes of obtaining informed consent required for medical experiments in a nonemergency room environment, and pursuant to subdivision (a), if a person is unable to consent and does not express dissent or resistance to participation, surrogate informed consent may be obtained from a surrogate decisionmaker with reasonable knowledge of the subject, who shall include any of the following persons, in the following descending order of priority:

1. (1) The person’s agent pursuant to an advance health care directive.
2. (2) The conservator or guardian of the person having the authority to make health care decisions for the person.
3. (3) The spouse of the person.
4. (4) An individual as defined in Section 297 of the Family Code.
5. (5) An adult son or daughter of the person.
6. (6) A custodial parent of the person.
7. (7) Any adult brother or sister of the person.
8. (8) Any adult grandchild of the person.
9. (9) An available adult relative with the closest degree of kinship to the person.

(d)

1. (1) When there are two or more available persons who, pursuant to subdivision (c), may give surrogate informed consent and who are in the same order of priority, if any of those persons expresses dissent as to the participation of the person in the medical experiment, consent shall not be considered as having been given.
2. (2) When there are two or more available persons who are in different orders of priority pursuant to subdivision (c), refusal to consent by a person who is a higher priority surrogate shall not be superseded by the consent of a person who is a lower priority surrogate.

(e) For purposes of obtaining informed consent required for medical experiments in an emergency room environment, and pursuant to subdivision (a), if a person is unable to consent and does not express dissent or resistance to participation, surrogate informed consent may be obtained from a surrogate decisionmaker who is any of the following persons:

1. (1) The person’s agent pursuant to an advance health care directive.
2. (2) The conservator or guardian of the person having the authority to make health care decisions for the person.
3. (3) The spouse of the person.
4. (4) An individual defined in Section 297 of the Family Code.
5. (5) An adult son or daughter of the person.
6. (6) A custodial parent of the person.
7. (7) Any adult brother or sister of the person.

(j) Subdivisions (c) and (e) do not apply to any of the following persons, except as otherwise provided by law:

1. (1) Persons who lack the capacity to give informed consent and who are involuntarily committed pursuant to Part 1 (commencing with Section 5000) of Division 5 of the Welfare and Institutions Code.
2. (2) Persons who lack the capacity to give informed consent and who have been voluntarily admitted or have been admitted upon the request of a conservator pursuant to Chapter 1 (commencing with Section 6000) of Part 1 of Division 6 of the Welfare and Institutions Code.