EPA is taking direct final action to approve revisions to the Maryland State Implementation Plan (SIP) amending the definition of "fuel-burning equipment." The revision removes the word "furnace" from the definition of "fuel-burning equipment" in one of Maryland's regulations and also removes the redundant definition of "fuel-burning equipment" from another section. EPA is approving these revisions to the definition of "fuel-burning equipment" in accordance with the requirements of the Clean Air Act (CAA).