From Arizona Revised Statute 28-653:
“A. Any individual who is stationed in a state highway work zone to provide temporary traffic control shall have completed training and be certified by a program that meets the training and certification standards of the national safety council highway flagger training program, the American traffic safety services association flagger program or an equivalent program that meets the same objectives. An equivalent program must meet the United States department of transportation federal highway administration standards for the control of traffic through highway work zones as defined in the manual on uniform traffic control devices for streets and highways.
B. Flaggers shall repeat training and certification requirements at least once every four years.
C. This section does not apply to law enforcement personnel who are employed by governmental entities.”