A copy of any receipt, application, plan, notice, order or other document or of any entry in a register, in the possession of a Board shall, if duly certified by the legal keeper thereof or other person authorised by the Chief Executive Officer in this behalf, be admissible in evidence of the existence of the document or entry, and shall be admitted as evidence of the matters and transactions there in recorded in every case where, and to the same extent to which, the original documents or entry would, if produced, have been admissible to prove such matters.