20 years ago, on December 24, 2002, it was decided to replace the paper version of the Belgian official journal by its online version, starting in 2003. Here is how Belgian citizens can access theirs laws and other official texts: http://www.ejustice.just.fgov.be. (It's also available in HTTPS.)

I believe it looks exactly the same since 1997, when that site was originally introduced, and wanted to share it. The text can be searched using a form where you have to first click the "Search" button, then the "List" button to actually go to the result page. On a given result, you can download its PDF version by clicking the "Image" button.

It looks like the site is a bunch of Perl CGI scripts but I have no idea how documents are authored, or how the PDF generation is done.

It's available only in French, Dutch, and German. While German is an official language in Belgium, the German version is only a translation, not an official text.