At first, it was constituted of a President and a Vice-president, and quota was unlimited, but soon after according to the financial matter the office organization was revised on November 25 in the same year (in 1875), the member was a President, a Vice-president, two secretaries who support them, (abolished in 1886), and other 28 bureaucrats, in total 32 members were admitted as the quota.
当初は正副議長各1名が置かれ定員は無制限とされたが、程なく財政上の都合から同年11月25日に職制が改正されて正副議長各1名とこれを補佐する幹事2名（1886年廃止）、その他の議官28名の計32名が定数とされた。