Violation of a statute enacted for the public safety is negligence per se

Sisk v. Ball, 91 Ariz. 239, 371 P.2d 594 (1962):

“Violation of a statute enacted for the public safety is negligence per se,Anderson v. Morgan, 73 Ariz. 344, 241 P.2d 786 (1952), and when this theory is supported by the evidence, [a party] is entitled to have a properly worded instruction on this issue read to the jury. Of course, a violation of the statutory duty must be also a proximate cause of the injury to constitute actionable negligence. Caldwell v. Tremper, 90 Ariz. 241, 367 P.2d 266 (1961).” 91 Ariz. at 242, 371 P.2d at 595-96.

 Here are a couple of definitions of negligence per se: nolo.comlexisnexis.com