I don't think the BMJ or other parts of the feral government have in-sourced the editorial process. Historically, juris claimed copyright-like protection for the consolidated text, as can be seen here: https://web.archive.org/web/20060826035858/http://www.gesetz...

I think producing consolidated text is viewed by large parts of the legal community as “just typing”, similar to early attitudes towards programming, which is why few people care. Most of the controversy around juris is about access to court decisions.