I have a 50 unit 3 story senior housing apartment building under construction in my community. Each apartment has a smoke detector installed in each bedroom and outside of the sleeping room. The contractor will not tie the individual alarms into the fire alarm panel to provide for notification to the local FD. Only the detectors located in the public areas will initiate a building fire alarm for local evacuation and FD notification. I have spent hours reviewing NFPA 72 and our Building Code and cannot find a code or reference regarding my issue. Any assistance is greatly appreciated.