I think this is where "German citizens can easily find an up-to-date version of their laws online" :
http://www.bgbl.de/Xaver/start.xav?startbk=Bundesanzeiger_BG...
http://www.bgbl.de/Xaver/start.xav?startbk=Bundesanzeiger_BG...
The Bundesanzeiger is merely the last step in the law making process. First, the two law making institutions (Bundestag, Bundesrat) have to vote in favor of the law and the president has put his X under it. Only after the law is published in the Bundesanzeiger it takes effect.