For non-trading large NOx units subject to this chapter, the owner or operator shall: Continuously monitor NOx emissions with a CEM system in accordance with 40 CFR Part 75, Subpart H and 40 CFR §51.121(i)(4); and Maintain records and submit reports regarding NOx emissions in accordance with 40 CFR Part 75. The owner or operator of a non-trading large NOx unit subject to this regulation shall include emissions data obtained from a CEM system pursuant to §A of this regulation in the CEM quarterly reports submitted to the Department pursuant to COMAR 26.11.01.11E(2).