Arizona keeps personal watercraft rules simple, but the ones that exist matter. Here is the short version.

Do I need a boating license?

No. Arizona does not require a boating license or safety course to operate a personal watercraft. The Arizona Game and Fish Department offers free boating education, and it is worth an hour if you are new.

Life jackets

Every person on a personal watercraft must wear a Coast Guard approved life jacket. Not carry it. Wear it.
Kids 12 and under must wear one on any boat that is underway.

Every Jet Action rental includes life jackets.

Who can rent

The person signing the Jet Action rental contract must be 21 or older and must be the card holder.

On the water

Clip the lanyard. The engine cut-off cord goes on the driver's wrist or life jacket.
Respect no-wake zones near marinas, ramps, beaches and the narrows.
Give room. Keep a wide berth from swimmers, kayaks, paddle boards and boats towing skiers.
No wake jumping behind boats. It is how most PWC injuries happen.
Use a spotter for tubing. Arizona requires an observer when towing someone, in addition to the driver.
Remember the VX-C has off-throttle steering, but you still steer best with a little throttle.

Clean, drain, dry

Several Arizona and Colorado River lakes have invasive quagga mussels. Pull the plug, drain water and let things dry before heading to a different lake. Some lakes inspect watercraft on the way out.

This is a summary, not legal advice. Check the Arizona Game and Fish Department for current regulations.