CO2 Monitors in Non-Densly Occupied Spaces

If the HVAC systems have limited capabilities to provide OA monitoring system then CO2 differential monitoring is acceptable. There are few conditions that the design has to meet. CO2 sensors should be located in all the spaces and and a CO2 sensor on the OA intake. The CO2 differential between the OA CO2 and the space CO2 cannot exceed 530 PPM. If it exceeds then the system should be capable of increasing the ventilation rate in the spaces to bring down the CO2 differential below 530 PPM. If the design can meet the above criteria then CO2 sensors can be used in lieu of air monitoring system.

Can you list what CIR or LEED interpretation where this is stated?