1. A declaration that designates another person to make decisions governing the withholding or withdrawal of life-sustaining treatment may, but need not, be in the following form:
2. The designation of an agent pursuant to chapter 162A of NRS, or the judicial appointment of a guardian, who is authorized to make decisions regarding the withholding or withdrawal of life-sustaining treatment, constitutes for the purpose of NRS 449A.400 to 449A.481, inclusive, a declaration designating another person to act for the declarant pursuant to subsection 1.