9A document in writing signed by the Minister stating that the person named in the document has been appointed as a conservation officer or assistant conservation officer shall, without proof of the appointment or signature of the Minister, be accepted by all courts as conclusive proof that the person has
(a)
successfully passed the examination referred to in section 8;
(b)
taken the oath of office referred to in section 12; and
(c)
been appointed to the office that he is stated to hold,
and the person in possession of such document shall, upon proof that his name is the same as the person named therein, be deemed to be the person named therein.