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This is an emission control information label from an engine manufacturer. The label certifies that a CPWRB18.3NGP engine with 18.3L displacement complies with U.S. EPA regulations for 2012 model year nonroad and stationary engines. The engine is certified for operation on natural gas (NG) or liquefied petroleum gas (LPG) with specific emission standards: 2.0 g/HP-hr for NG or LPG applicable to CO, 1.0 g/HP-hr of NOx and 0.7 g/HP-hr of non-methane hydrocarbons for NG, and 4.4 g/kW-hr of CO and 2.7 g/kW-hr of NOx for LPG stationary operation. The label specifies exhaust emissions control systems, indicates a horizontal spark plug configuration with a 0.025-inch gap, and includes a partial label part number reference. This certification label is affixed to the equipment to demonstrate regulatory compliance for mobile and stationary applications.