533. Witnesses.

Witnesses must be required to take an oath1, or to affirm, before giving evidence at any hearing2. Witnesses3 must first be examined by the party calling them4; may then be cross examined by the opposing party5; may then be re-examined by the party calling them6; and may then be questioned by the committee7. Any further questioning of the witnesses is at the discretion of the committee8. The committee may of its own motion require a person to attend the hearing to give evidence, or to produce relevant documents9. No witness as to fact may observe the proceedings until he