(a) The affidavit of caregiver consent for a minor's health care is superseded by written notification from the minor's parent, guardian or legal custodian to the health care professionals providing services to the minor that the affidavit has been rescinded.
(b) The affidavit of caregiver consent for a minor's health care is valid for one year unless the minor no longer resides in the caregiver's home or a parent, guardian or legal custodian revokes his or her approval by written notification to the health care professionals providing services to the minor that the affidavit has been rescinded. If a parent, guardian or legal custodian revokes approval, the caregiver shall notify any health care provider or health service plans with which the minor has been involved through the caregiver.