Scope and Application (2018) This Guide is to be applied to exhaust emission abatement systems fitted to ABS classed vessels and covers SOx scrubbers@ SCR systems and EGR arrangements@ together with Exhaust Emissions Monitoring Systems (EEMS) fitted in conjunction with the aforementioned emission abatement systems@ or installed as an alternative Onboard NOx Verification Procedure in accordance with the Direct Measurement and Monitoring Method of the NOx Technical Code. The optional exhaust emission abatement notations detailed under 1/9.3 through 1/9.9 will be assigned to a vessel upon request and where the exhaust emission abatement system has been verified to be in compliance with the applicable requirements of this Guide. Where a notation has not been requested@ the exhaust emission abatement system is to be verified to be in compliance with the minimum requirements prescribed under 1/9.11 of this Guide. This is applicable to new construction and existing vessel modifications.