Wow. I wouldn't know where to start, but for the safety of the patients I hope you and the other nurses at your facility look into getting that policy changed. You have every right to be concerned about this, and I'd imagine it is a major liability for the hospital if a patient decided to sue and this was brought against someone in court

In other words, there is no reason why ER nurses should not be reporting to floor nurses, for the safety of the patients.