(1) Where the owner of an omnibus instructs the driver thereof to observe a time-table and such time-table is so framed that such driver could not observe it without driving such omnibus at a speed which would be a contravention of this Part of this Act, such owner shall be deemed to aid, abet, counsel, or procure the commission of an offence punishable on summary conviction within the meaning of section 22 of the Petty Sessions (Ireland) Act, 1851.
(2) For the purposes of this section: -
(a) proof that the owner of an omnibus issued to all or any of his employees or to the public a time-table applicable to such omnibus shall be conclusive evidence that such owner instructed the driver of such omnibus to observe such time-table;
(b) a certificate purporting to be signed and issued by an officer of the Ordnance Survey and to certify the distance between any two places shall be conclusive evidence (without proof of the signature of such officer or that he was such officer) that the