Ariz. Rev. Stat. § 28-1111 – Commercial and noncommercial vehicles and trailers; website publications

A. In cooperation with the department of public safety, the department of transportation shall develop easily understandable publications of the laws, rules and department policies relating to commercial and noncommercial motor vehicles, trailers and vehicle combinations that contain the following:
1. 1. Weight thresholds specifying the differences between commercial and noncommercial vehicles and vehicle combinations.
2. 2. Equipment requirements for different weight classes of commercial and noncommercial vehicles and vehicle combinations.
3. 3. Allowable vehicle combinations.
4. 4. Other information the director deems necessary.
B. The department of transportation and the department of public safety shall jointly develop and publish on the website of each agency the information prescribed by subsection A no later than January 1, 2009.