An Introduction to SAGIndie Contracts & Incentives
Since July 1, 2005, all of the SAG low budget agreements have been modified to make it even easier for you to use professional actors. These changes came about in part as a result of input and suggestions from filmmakers and actors who have worked with these contracts.
In addition, there are two brand new contracts for shorts and very low budget productions. And for the first time ever you can actually download and review sample contracts before you start the signatory process.
Here is some info from the SAG website.