I am the owner of a legislative information and tracking service in Massachusetts that can be found at www.instatrac.com.
Most legislation filed in the 50 states of the US would change existing laws on the books of their states. Many of them require that new legislation is written by taking existing laws, using the strike-through feature to indicate language that is to be removed, and including replacement language either in italics or in color.
Massachusetts is not one of those states. Bills are written by making reference to the chapters and sections, and even lines, of laws that are to be stricken, with the new language appearing on the body of the bill.
I want to re-do all 7000 or so of laws filed in Massachusetts each two-year cycle (the next one starts in January 2017) to show the laws, the proposed stricken language, and the proposed replacement language.
This is a tricky task because there are no standards in the way citations appear in legislation. As a result, this is a tough job, one that I'm looking to automate as much as possible.