  In this paper we prove Conjecture 1.2 in \cite{B-F}. This enables us to
establish the meromorphic continuation of the standard partial $L$ function
$L^S(s,\pi^{(n)})$. Here, $\pi^{(n)}$ is a genuine irreducible cuspidal
representation of the group $GL_r^{(n)}({\bf A})$.
