3.  The certificate—

(a)shall be in writing and—

(i)be included as part of the instrument, or

(ii)be endorsed upon or, where separate, be physically attached to the instrument concerned;

(b)shall contain a sufficient description of—

(i)the instrument concerned where the certificate is separate but physically attached to the instrument, and

(ii)the category in the Schedule hereto into which the instrument falls;

(c)(i)shall be signed by the transferor or grantor or by his solicitor or duly authorised agent, and

(ii)where it is not signed by the transferor or grantor or by his solicitor, it shall contain a statement by the signatory of the capacity in which he signs, that he is authorised so to sign and that he gives the certificate from his own knowledge of the facts stated in it.