Reminds me of a similar project for french law
French bills evolution versioned in git and visualized The Law Factory: french bills as git, opendata and dataviz https://www.lafabriquedelaloi.fr/
"Law is Code" on The Law Factory: french bills as git, opendata and dataviz - https://news.ycombinator.com/item?id=7817357 May 2014 (0 comments)
Poland has an official, somewhat manual version of this - the ISAP system.
Actual bills are written in the form of patches ("§1. In the law X paragraph 5, the words "such and such" are replaced with "this and that". §2. The law X paragraph 4 is striked. §3. After law X paragraph 8, a new paragraph 8a is added that says "etc. and so on".)
After a patch or a collection of patches are passed, they are combined together and a unified version of the law is published. These documents aren't technically the law, they just show a snapshot of what the law is at the specific moment.
ISAP system is an online collection of all bills that were passed, plus crosslinks between laws that change/supercede/otherwise interact with each other, plus current and archival unified versions, plus related administrative orders and other miscellanious documents. Makes looking up laws and changes to laws very easy.
It's the European law, inspired mostly by French, IIRC. Belgium has the same, for instance.
I mostly meant the web app. Forgot to link it. https://isap.sejm.gov.pl/isap.nsf/home.xsp Unfortunately it's only in Polish.
Example page for the traffic code https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU19970...
First PDF is the original, second PDF is the unified version, then there's links - 4 others changed, 4 explicitly obsoleted, 12 implicitly obsolete, 707 administrative orders, 12 Constitutional Tribunal rulings, 11 previous + current unified versions, 212 patches, 14 relevant EU directives.
And the officially maintained website (that only tracks the final law changes instead of the whole process): https://www.legifrance.gouv.fr/