The bill amends Chapter 45-23 of the General Laws by adding a new section titled "Subdivision of oversized lots for residential use." This new section allows applicants involved in land development projects, specifically for residential or mixed-use purposes, to utilize the administrative subdivision process established under 45-23-37 to request approval for subdividing oversized lots. The criteria for subdivision will be based on the median lot area, width, depth, and frontage of direct abutters or the median dimensions of all parcels on a contiguous block, whichever is less for each individual dimension. Applicants may rely on the map of a local tax assessor to determine these dimensions.

Additionally, the bill requires each city or town to amend its local regulations to conform to this section by December 31, 2025. The act is set to take effect upon passage.