“42.—(1) Every register shall be—

(a) deemed to be in the proper custody when in the custody of—

(i) the Board or any officer of the Board authorised in that behalf by the Board, or

(ii) a contractor or any employee of the contractor authorised in that behalf by the contractor, and

(b) admissible in evidence without further proof on production from the proper custody.

(2) Prima facie evidence of any entry in any register may be given in any court or in any legal proceedings by the production of a copy of such entry purporting to be certified to be a true copy by an officer of the Board authorised in that behalf by the Board or an employee of a contractor authorised in that behalf by the contractor and it shall not be necessary to prove the signature of such officer or employee or that he was in fact such officer or employee or was in fact so authorised.

(3) A certificate, purporting to be signed by an officer of the Board authorised in that behalf by the Board or an employee of a contractor authorised in that behalf by the contractor that any premises specified in such certificate are not entered in the register specified in such certificate shall be sufficient evidence until the contrary is shown of the matters so certified, and it shall not be necessary to prove the signature of such officer or employee, or that he was in fact such officer or employee, or was in fact so authorised.”.