Unlike prefectures outside Hokkaido, no prefectural assembly or county office was formally established in those three prefectures because of continuous tasks as a development commissioner and because of too low population density.
なお、道外の県とは異なり、これ以降も続く開拓使的な任務の都合や低過ぎる人口密度などのため、これらの3県に県議会や郡役所が正式に設置されることはなかった。