In an effort to prevent agricultural waste, the California Agricultural Prorate Act (CAPA) established programs intended to restrict competition among farmers and stabilize prices. In particular, CAPA established a system to classify raisins and distribute each grade of raisin in a manner deemed necessary for market stabilization. The system included participation by local farmers in the form of public hearings and voting. However, final authority for administration of the program lay with a state commission created by CAPA. Brown (plaintiff), a raisin farmer, sued to enjoin state officials (defendants) from enforcing CAPA, arguing that CAPA violated the Sherman Act.