Related Rule
Germany
Practice Relating to Rule 75. Riot Control Agents
Germany’s Military Manual (1992), under the heading “Chemical Weapons”, proscribes “the use of irritant agents for military purposes”. 
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, § 434.
Germany’s Law Implementing the Chemical Weapons Convention (1994) states:
§ 1 Definitions
For the purposes of this Law:
2. permitted purposes mean
a) the purposes listed in Article II Nr. 9 (a) to (c) of the Convention,
b) the use of riot control agents within the meaning of Article II Nr. 7 of the Convention for the maintenance of public security and order by the police forces of the Federation and the Länder or by the Federal Armed Forces when taking measures according to the Law on the Use of Coercive Force and the Exercise of Special Powers by Soldiers of the Federal Armed Forces and Civilian Guards, as well as the training for such a use. 
Germany, Law Implementing the Chemical Weapons Convention, 1994, Section 1(2)(a)–(b).
Germany’s Law Implementing the Chemical Weapons Convention (1994), as amended in 2004, states:
§ 1 Definitions
For the purposes of this Law:
2. permitted purposes mean
a) the purposes listed in Article II Nr. 9 (a) to (c) of the Convention,
b) the use of riot control agents within the meaning of Article II Nr. 7 of the Convention for the maintenance of public security and order
- by the police forces of the Federation and the Länder,
- by the Federal Armed Forces when taking measures according to the Law on the Use of Coercive Force and the Exercise of Special Powers by Soldiers of the Federal Armed Forces, Allied Armed Forces and Civilian Guards or
- by the Federal Armed Forces in deployments within the framework of a system of mutual collective security (Article 24 para. 2 of the Basic Law)
as well as the training for such a use. 
Germany, Law Implementing the Chemical Weapons Convention, 1994, as amended in 2004, Section 1(2)(a)–(b).
In its Annual Disarmament Report 2004, submitted to the Bundestag (Lower House of Parliament) in 2005, Germany’s Federal Government reported:
On 15 October 2004, an amendment to the Law Implementing the Chemical Weapons Convention came into force. This amendment created the legal basis for the admissibility of the use of riot control agents by the Federal Armed Forces in deployments within the framework of systems of collective security. The Chemical Weapons Convention allows such use. The violent riots in Kosovo in March 2004 had made clear that in deployments abroad within the framework of Article 24 of the Basic Law of the Federal Republic of Germany, the Federal Armed Forces need to have at their disposal, apart from military equipment, also means which effectively and in a proportionate manner serve to maintain public security and order. The equipment of the Federal Armed Forces with riot control agents, e.g. irritants and pepper spray, will, under the threshold of the use of firearms, enable them to react in a way that is adapted to the situation and graduated. 
Germany, Federal Government, Annual Disarmament Report 2004, 17 June 2005, p. 33.