This depends on the employee's position (e.g. law enforcement, lawyer, janitor, adminstrative assistant), job description, and probably how they are paid

Except for the minimum wages of minors, the payment of wages, and the overtime requirements for certain public employees, workers in Arizona are governed by the FLSA.  Under the Equal Wages Act, a charge must be filed with the labor department of the Industrial Commission of Arizona.

FLSA - The Fair Labor Standards Act is the federal law that establishes minimum wage, overtime pay, recordkeeping, and child labor standards for full -time and part-time workers in the private sector and in Federal, State, and local governments. Suspected violations of the FLSA may be reported to:

Phoenix District Office US Department of Labor
ESA Wage & Hour Division
3221 N. 16th Street #301
Phoenix, Arizona 85016
602) 640-2990

For more information, visit the Department of Labor's web site