Occupancy Sensors may be replaced

I believe that your instinct is correct here. The goal is to reduce energy use by linking the lighting to occupancy. Timers are unlikely to be nearly as efficient - particularly in private offices and meeting rooms, although occupancy patterns in open office areas are increasingly variable for a wide variety of occupiers. If you believe you can make a strong case and you are relying on the points then you could submit a CIR, but I wouldn't get my hopes up on this.