A red flag with white diagonal stripe from staffhead to opposite corner shall be recognized as a diver flag and shall be displayed when a person or persons are actually diving below the water surface and are equipped with apparatus to allow such person or persons to breathe under water.
A.R.S. § 5-362
Diver flag
Official source: Arizona State Legislature. Reproduced from public-domain Arizona statutes; confirm against the official source for the current text. Not legal advice.