Nev. Rev. Stat. § 449A.624
An advance directive for psychiatric care becomes operative when it is communicated to a physician or any other provider of health care and the principal is determined by two providers of health care, one of whom must be the attending physician or a licensed psychologist and the other of whom must be a physician, a physician assistant, a licensed psychologist, a psychiatrist or an advanced practice registered nurse who has the psychiatric training and experience prescribed by the State Board of Nursing pursuant to NRS 632.120, to be no longer able to make or communicate decisions regarding the provision of psychiatric care. If the principal is determined to be no longer able to make or communicate decisions regarding the provision of psychiatric care and subsequently the principal's attending physician or an advance practice registered nurse who has the psychiatric training and experience prescribed by the State Board of Nursing pursuant to NRS 632.120 and has an established relationship with the principal determines that the principal has regained the ability to make or communicate decisions regarding the provision of psychiatric care, the advance directive is no longer operative. When the advance directive is operative, a physician and any other provider of health care shall act in accordance with the provisions of the advance directive and with the instructions of a person designated pursuant to NRS 449A.618, or comply with the requirements of NRS 449A.639 to transfer the care of the principal.
NRS 449A.624