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The electricians union's responsibilities should stop at the plugs. Really, it should stop when power reaches the first piece of specialized equipment, but that depends on what kind of dimmers you have and how power gets from the dimmers to the lights. I'm in a right-to-work state, though.
Also, get a copy of The Backstage Handbook if you don't have one already. It's old, but still incredibly relevant. I use knowledge gained from it a lot. I also recommend Barbizon's Electrician's Handbook (PDF), which is also an iOS app and Android app.