Related Rule
Germany
Practice Relating to Rule 69. Loss of Inviolability of Parlementaires
Germany’s Military Manual (1992) provides:
The parlementaire loses his right of inviolability if it is proved in an incontestable manner that he has taken advantage of his privileged position to provoke or commit an act of treason … Such a case of misuse, which implies the right to detain the parlementaire … exists if the latter has committed acts contrary to international law and to the detriment of the adversary during his mission. This includes particularly the following activities:
– gathering intelligence beyond the observations he inevitably makes when accomplishing his mission;
– acts of sabotage;
– inducing soldiers of the adverse party to collaborate in collecting intelligence;
– instigating soldiers of the adverse party to refuse to do their duty;
– encouraging soldiers of the adverse party to desert; and
– organizing espionage in the territory of the adverse party. 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten KonfliktenHandbuch, August 1992, § 229.