According to the AP article:
SAG's national board has already authorized its negotiating committee to call for a strike authorization vote if mediation failed. The vote would take more than a month and require more than 75 percent approval to pass.
SAG is seeking union coverage for all Internet-only productions regardless of budget and residual payments for Internet productions replayed online, as well as continued actor protections during work stoppages
But the AMPTP said it was untenable for SAG to demand a better deal than what writers, directors and another actors union accepted earlier in the year, especially now that the economy has worsened.