Artikel 20

1. Installations and works directly serving the purpose of defence, as well as safety installations, shall be erected or adapted by the Federal Republic in such amounts, areas and types as are needed for the common defence. Where there is a special need for secrecy or security, the Forces themselves may erect or adapt such installations or works, provided that there is prior consultation with the Federal Government.
2. The Federal Government shall co-operate with the Forces in order to ensure that military and civil measures of protection necessary to meet special security requirements can be implemented by the Forces and the German authorities efficiently and without delay. It shall provide that the preparations necessary for the implementation of such measures of protection will be done in time and in a sufficient amount.
3. Measures taken under this Article shall be subject to the jurisdiction of the Arbitration Tribunal referred to in Article 9 of the Convention on Relations between the Three Powers and the Federal Republic of Germany, provided that publicly or privately owned property has been or will be seriously damaged thereby. Article 12 of the Charter of the Arbitration Tribunal shall apply to such measures provided that irremediable damage may be caused thereby to substantial values.