I'm unclear if 10% of space can be exempted for this prerequisite. Could someone clarify this? We have a project where we have several retail spaces on the ground floor of an office high rise. We are currently reviewing retail leases to understand if the owner has authority to measure fresh air to the spaces. The office portion of the building has a central plant and supply, so it is under central control. What can we expect will be the position of our reviewer regarding retail spaces?