18.—(1) Any list purporting to be published by the authority of the Society and to contain the names of solicitors who have obtained practising certificates for the year referred to in the list shall, unless the contrary is proved, be evidence that the persons named in that list are solicitors holding those certificates.
(2) The absence from such list of the name of any person shall, unless the contrary is proved, be evidence that that person is not qualified to practise as a solicitor during the year referred to in the list, and, as respects any such person, an extract from the roll, certified as correct by the registrar, shall be evidence of the facts appearing in the extract.