IFC Section 901 requires that fire alarm systems be installed, tested, and maintained per NFPA 72 standards. Automatic detection systems in certain occupancies must activate alarms immediately upon detection. Manual pull stations must be accessible and clearly labeled. System verification before occupancy ensures proper installation. Weekly inspection and annual maintenance verify continued operation. Occupant notification must be clear and understandable, with audible and visual signals. Voice communication systems must provide clear instructions.