Today Federal Councillor Simonetta Somaruga (Social Democrats) presented a draft law by which Switzerland hope to ban "mercenary acitivities" of security firms.
The law forsees a notification requirement for firms which want to do business outside Switzerland and the EU. The authorities then have the possibility to allow or decline the activity. In case of violation the confederation can sanction the companies.
The text of the law and the communiquee is only available in German, French and Italian. Therefore, I post the link of the translated news release (Google).

You find the news release here: http://translate.google.de/translate...msg-id%3D47532

The text of the bill: http://www.ejpd.admin.ch/content/dam...men/entw-d.pdf (German)

The dispatch: http://www.ejpd.admin.ch/content/dam...rmen/bot-d.pdf (German)