Stage Directors and Choreographers Society

The Stage Directors and Choreographers Society (SDC), formerly known as Society of Stage Directors and Choreographers (SDC), is an independent national labor union established in 1959, representing theatrical directors and choreographers working on Broadway, National Tours, Off-Broadway, and in various resident, regional, and stock theatres throughout the United States. SDC collectively bargains contracts with producers, creating the national standards for stage direction and choreography.

Source: Wikipedia — Stage Directors and Choreographers Society (CC BY-SA 4.0)