Hospitals and small emitters (HSEs) There are simplified provisions for hospitals and also installations with emissions lower than 25,000t CO2e per annum, and where the installation carrying out the activity of combustion has rated thermal capacity below 35MW. These installations will be subject to emissions targets instead of having allowance surrender obligations. Ultra-small emitters (USEs) If eligible, installations with emissions lower than 2,500t CO2e per annum may obtain ultra-small emitter status. They would not be required to hold a permit but are still required to monitor and must notify their regulator if they go over the threshold.