I have a high-rise residential building project, which will be naturally ventilated. No implementation within residential units will be included in the project scope of work. 

I wonder if CO2 sensor will need to be implemented by owner or included in the lease agreement within residential units. Also, if closing -openable window alarm can be included in the lease agreement, or in this case, as the owner is implementing the windows, he or she is forced to include the alarms in his or her project scope of work.