My question involves estate proceedings in the state of: Arizona

I want to fill out an advance directive. The first part of the Arizona version of an advance directive is for naming an agent and a backup agent. Do I absolutely need to name an agent. I know, it probably seems like a stupid question with an obvious answer. Will my desires filled out in the form be enforced by the state or do I need an agent to actively try to enforce my desires as written. Thank you in advance.