After reading an ammendment to the copyright law being debated in the Australian parliment, I went looking for tools to view a diff on the old act and the proposed changes.<p>That lead me to an old HN discussion [0] about using VCS to manage laws. In turn, that discussed the tool AT4AM that the EU parliment uses to create what are essentially "patches" to existing laws, in order to debate as ammendments. To my surprise, this was released as open source only a few months ago, and seems under active development.<p>[0] <a href="https://news.ycombinator.com/item?id=3967921" rel="nofollow">https://news.ycombinator.com/item?id=3967921</a>