(b) By itself or another, trades within the local limits of the jurisdiction of the court; or (c) Is in the possession of immovable property situate within those limits and is to be sued with reference to such property or for money charged thereon; or (d) Has expressly or impliedly waived the privilege accorded to it by this section. (S. 86). A person may, however, as tenant of immovable property sue without such consent as is mentioned above, a foreign state, a foreign Ruler, ambassador, envoy or High Commissioner from whom he holds or claims to hold the property. No such Ruler of a foreign State, ambassador, envoy or High Commissioner of a Commonwealth country shall be arrested and, except with the consent of the Central Government, certified in writing by a Secretary to the Government, no decree can be executed against the property of any foreign state, the ruler of a foreign State, ambassador or envoy of a foreign State or any High Commissioner of a Commonwealth country.