I know this is more of a throwaway cynical quip, but this is a biased line of thinking. CEO's are, for obvious reasons, more likely to do things they wouldn't be held liable for, versus do things which would see them likely to be punished. So executives might, for example, get away with things by successfully skirting the line of legality.
Say an AI CEO blatantly crosses this line, now who is liable?
It is already used widely across industries where one would think people should be more conservative ( healthcare transcription services come to mind, but it is hardly the only example of this ). As always in America, only lawsuits will shows us how the dust has settled.