Rinji-hatsuhei indicated the following system: When an act of robbery or piracy occurred, the Imperial Court issued 'hatsuhei-chokufu' (an imperial order authorizing the mobilization of soldiers) corresponding to a request from a kokushi, and the kokushi sent soldiers in the province to combat the robbers or pirates.
臨時発兵とは、群盗海賊の発生に際し、国司からの奏上に応じて「発兵勅符」を国司へ交付し、国司は勅符に基づき国内の兵を発して群盗海賊を制圧する方式を指す。