I pay little attention to SAG contracts, but after the Writer's Guild strike, I'd be expecting SAG to follow suit with major asks to protect its members from AI if they have not already covered it.
thanks. i have recently been asked by a couple of acquaintances that have done a few character voices in the past what I thought on AI and what can really be done with it. because of their infrequent performances, they aren't union members, but I'll pass along these links.
NAVA also has guidelines for protection against AI abuse: https://navavoices.org/synth-ai/