The Bundeswehr Fighter-Bomber Wing 33 is stationed in Büchel. It has the task, within the framework of NATO's nuclear cooperation, of practicing with its Tornado aircraft the transport and dropping of the atomic bombs stationed there. In the event of war, Fighter-Bomber Wing 33 would deliver nuclear bombs to their targets following their release by the US President and operational authorization through the U.S. chain of command. In the event of war, the German soldiers thus acquire the “power of disposal” over nuclear weapons under the auspices of NATO. This is so despite the fact that the release of the weapons is only effective for dropping them on targets chosen by the U.S. There are no indications that peacetime nuclear exercises have involved actual nuclear weapons rather than practice bombs.
As a party to the NPT, the Federal Republic of Germany as a non-nuclear weapons state is obliged under Art. 2 NPT not to "accept nuclear weapons or other nuclear explosive devices or the power of disposal thereof from anyone, directly or indirectly".
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The German Text you can find here:https://www.ialana.de/aktuell/ialana-deutschland-zur-aktuellen-diskussion/ialana-zu-abc-waffen/2648-bernd-hahnfeld-widerspruch-gegen-die-behauptung-der-bundesregierung-die-von-deutschland-im-rahmen-der-nato-praktizierte-nukleare-teilhabe-verstosse-nicht-gegen-den-nichtverbreitungsvertrag