6The production of a printed copy of a byelaw purporting to be made by an internal drainage board upon which is indorsed a certificate, purporting to be signed on their behalf, stating—
(a)that the byelaw was made by that board;
(b)that the copy is a true copy of the byelaw;
(c)that on a specified date the byelaw was confirmed; and
(d)the date (if any) fixed under any enactment for the coming into force of the byelaw,
shall be prima facie evidence of the facts stated in the certificate and without proof of the handwriting or official position of any person purporting to sign the certificate.