The restrictions on carry-on luggage are based on EU Directive (EC) 300/2008 in conjunction with EU Directive (EC) 185/2010.
Please note that the new rules only apply to passengers departing or transferring at airports in the EU, Norway, Iceland, and Switzerland. We therefore advise you to get information before flying, for example from an embassy or consulate if you will be flying from another country. You’ll find a complete list of foreign embassies and consulates in Germany at www.auswaertiges-amt.de. Please keep in mind that the staff of duty free shops etc. may not be familiar with all current regulations.