AZ SB1166

Prohibits public employers from spending public monies for union activities or entering into employment contracts that provide paid leave or compensation for union activities.

Voids and renders unenforceable any employment contracts that violate the prohibition on union compensation, effective prospectively; existing contracts in effect before the law's effective date cannot be renewed or extended if they conflict with this section.

Grants standing to any state resident and the Arizona Attorney General to sue public employers for violations, with courts required to award reasonable attorney fees and costs to prevailing plaintiffs.

Defines "union activities" as political activities advocating for or against candidates and lobbying activities to influence federal or state legislation, local ordinances, or ballot measures.

Exempts law enforcement officers and paid firefighters from the definition of "public employee," and allows public employees to use personal leave for union activities; establishes state preemption over local laws and regulations on this matter.