This legislation prohibits counties from requiring or prohibiting contractors on public works construction projects over $100,000 to enter into pre-hire agreements, project labor agreements, collective bargaining agreements or any other agreements with labor unions.  Additionally, counties may not discriminate against bidders, contractors, or material suppliers for refusing to adhere to agreements with unions.  When an imminent threat to public health or safety occurs, the chair may require contractors, bidders, and material suppliers to adhere to such agreements if the board of commissioners holds a public hearing that special circumstances exist requiring the adherence to the union agreements.  However, the possibility of a labor dispute because of the presence of non-union contractors or subcontractors may not be considered by the board.