This Law Firm Publication by Fisher & Phillips LLP discusses a new "right-to-work" law signed by Missouri Governor Eric Greitens that prohibits most public and private employers in Missouri from requiring employees to join a union or to pay union dues. The new law exempts federal government employers and employers covered by the Railway Labor Act (RLA). The new law takes effect on August 28, 2017 and applies to collective bargaining agreements (CBAs) entered into, renewed, extended, or amended after that date.