Section 11. Arrangement to preserve secret character of evidence

11. Any person who is required to give evidence on any matter or produce any document may object that such evidence or document will disclose information which is likely to expose him or his employer to unfair competition, and, on such objection being made, the Chairman of a Select Committee shall consider whether such objection is valid and if such objection is accepted as valid, the Chairman shall make arrangements to preserve the secret character of such evidence.