As a general rule, Uemon Gon no Suke and Saemon no Gon no Suke were Gonkan (a powerful official post) and served as Kebiishi, but the Saemon no Suke (Assistant Captain of the Left Division of Outer Palace Guards) and Uemon no Suke (Assistant Captain of the Right Division of Outer Palace Guards) were Seikan (a regular official post) and never served as Kebiishi.
なお、原則として検非違使を務めるのは権官である左右衛門権佐であり、正官である左右衛門佐が検非違使を務めることはない。