The voltage drop is regulated in Basic Law:
- "If this Basic Law or a federal law on defense, including the protection of the civilian population, stipulates that legal provisions may only be applied in accordance with this article, then, except in a case of defense, their application is only permitted if the Bundestag has determined that the tension has occurred or if he has particularly consented to the application. The determination of the voltage drop and the special approval in the cases of Paragraph 5 Clause 1 and Paragraph 6 Clause 2 require a majority of two thirds of the votes cast. "
On February 17, 2005, the maximum age to be convened in the event of a voltage drop was raised from 45 to 60 years (amendment to Conscription Act by Article 1 of the Armed Forces Reserve Reorganization Act).
In the history of the Federal Republic of Germany there has so far been neither a case of tension nor a case of defense.