Because of the uniquness of this treaty, a part of the allied western powers had a suspicion that they made a secret agreement on the military alliance, or had an opposing argument on the exterritoriality, so the ratification was delayed.
なお、この条約の特異性から一部欧米列強から軍事同盟の密約の疑惑を持たれるなどしたことや、治外法権の存在などに対する反対論があり批准が遅れた。