Ofwat is approving this Change Proposal. CPW128 has identified that a significant number of meter reads are being incorrectly rejected due to overly restrictive Volume Validation requirements within the Central Market Operating System (CMOS). We consider the proposed solution should help resolve this issue and allow increased numbers of meter reads to be accepted into CMOS upon first submission. Through amending the Upper and Lower Volume Thresholds, a large reduction in the current read rejection rate can be expected. As a result, overall data quality should improve with fewer incorrect rejections, and the process of data entry will be more efficient.