EPA is approving a State Implementation Plan (SIP) revision submitted by the State of Maryland. The revision pertains to amendments to the Code of Maryland (COMAR) 26.11.19.11, Lithographic and Letterpress Printing. EPA is approving the revision to meet the requirements to adopt Reasonably Available Control Technology (RACT) for sources covered by EPA's Control Techniques Guidelines (CTG) for offset lithographic printing and letterpress printing in accordance with the requirements of the Clean Air Act (CAA).