Admissibility of copy of entry as evidence

A copy of any entry in any book, register or list regularly kept in the course of business in the possession of a market committee shall, if duly certified in such manner as may be prescribed be admissible in evidence of the existence of such entry and shall be admitted as evidence of the matter and a transaction therein recorded in every case where and to the same extent to which the original entry would, if produced, be admissible to prove such matter.