It's no different than the Screen Actors Guild. They are a very powerful union. Their contract dictates that when the studio needs to fill a role, no matter how big, they must FIRST offer the opportunity to a union member before auditioning non-union actors. If a union member accepts, they are paid according to the contract.

I know this because one of my students was a retired actor. From all the things he told me, I would say the are one of the most powerful unions in the country.

There is no reason we couldn't achieve the same thing at ALPA.