117. On any prosecution for a corrupt or illegal practice or for any illegal payment, employment or hiring, the certificate of the returning officer at a European Parliamentary election—
(a)that the election mentioned in the certificate was duly held, and
(b)that the person named in the certificate was a candidate at the election, and
(c)that a registered party named in the certificate submitted a list at the election,
shall be sufficient evidence of the facts stated in it.