Application of seal and proof of documents
20.—(1) The application of the Body’s seal must be authenticated by the signature of—
(a)a member of the Body who is authorised (generally or specifically) for that purpose, or
(b)an employee who is so authorised.
(2) A document purporting to be duly executed under the seal of the Body—
(a)is to be received in evidence, and
(b)is to be treated as so executed unless the contrary is shown.