The Working level of competition varies from the original in a number of ways.
There are three levels of competition - Rookie, Elite and Expert. There are ten exercises in each level. Each level is split into two subdivisions of five. The exercises in each level increase in difficulty although the premise of each individual exercise is the same.
To compete in the Working level, a dog must either have attained an Advanced Level in the original rally or successfully completed the Working Proficiency Test.
The rules and regulations for this level may be found here.