When an oniwaban got a promotion, he naturally resigned the position of oniwaban which was for the lower-class retainers, however when his child stared working for the bakufu, the first position of this child had to be the oniwaban.
御庭番出身の者が出世すれば当然に軽輩の職務である御庭番からは離れることになるがその子が新たに幕府に出仕するときは御庭番となる定めであった。