15.—(1) A document purporting to be a copy of an entry in a register or to be a copy of a document lodged with a building control authority and which is certified by an officer of the building control authority concerned to be a correct copy of the entry or the document, as the case may be, shall be prima facie evidence of the entry or the document of which it purports to be a copy and it shall not be necessary to prove the signature of such officer or that he was in fact such officer.

(2) Evidence of an entry in a register may be given by the production of a copy of such entry, certified in accordance with the provisions of subsection (1), and it shall not be necessary to produce the register itself.