* British national act as a logic program (1982): the paper that is the based of most current effort in this domain https://www.researchgate.net/publication/234805335_The_Briti...
* Standford codex LSP initiative that try to standarize the format in which legal rule will be encoded https://law.stanford.edu/publications/developing-a-legal-spe... (as far as I know the initiative is still going, don't hesitate to contact oliver goodenough if you want to get involved)
* OECD recently publish (2 weeks a go) a full repport on current initiative in the domain https://www.oecd-ilibrary.org/governance/cracking-the-code_3...
* There was a workshop at last ICAIL where a lot of people showed their progress on the topic (link to all demo video in this gdoc : https://docs.google.com/document/u/0/d/1-7cJ0KsYzQ8IOY3L_bYX...)
* MIT started a journal on the topic ~1 year ago https://law.mit.edu/
If you want to work on this topic DM me :)