Evidence Act 1906

Any person present at any legal proceeding wherein he might have been compellable to give evidence and produce documents by virtue of a subpoena or other summons or order duly issued and served for that purpose, shall be compellable to give evidence and produce documents then in his possession and power, in the same manner, and in case of refusal shall be subject to the same penalties and liabilities, as if he had been duly subpoenaed or summonsed for that purpose.