Would it be a major hardship to require an EEG test to certify brain death? Seems like the biggest problem would be that not everyone would have the equipment, but surely they would have it in a hospital doing organ transplants? IANAD, though.
They have also got it wrong before -- times too numerous to mention.
Caution is very necessary here. Its a complicated subject (legally, morally, ethically, scientifically and medically) and questions do need to be asked about organ transplant practice and ethics from time to time.