The bill amends Massachusetts General Laws, specifically Chapter 126, Section 40, to enhance the reporting requirements for the population of jails and houses of correction. It introduces a new overview section titled "Overview of Quarterly Population Report for the Individual Massachusetts Sheriffs' Offices," which mandates sheriffs to compile and submit aggregate data on the inmate population quarterly. This data must include various identifiers such as probation central file numbers, state identification numbers, race and ethnicity, offense-based tracking numbers, and other relevant metrics. The reports must be devoid of any identifying information about individual inmates and are to be submitted to key legislative and public safety officials.

Additionally, the bill includes a section titled "Data Definitions & Disclaimer," which clarifies the definitions of critical data points like the Probation Central File Number, State Identification Number, and Offense-Based Tracking Number. It also notes that certain required data points, such as case disposition and bail amounts, are not maintained by the Sheriffs' Offices but originate from the Trial Court. The Massachusetts Sheriffs Association is working with the Trial Court and the Executive Office of Public Safety and Security to refine these metrics for better reporting in the future.