84. If questions of fact arise in matters before the Council or any of its committees, which the interests of the Community require to be investigated by the examination of witnesses on oath or otherwise or if it also becomes necessary, in the like interest, to institute inquiries into the truth of representations which may be made to the Council respecting matters within its jurisdiction, any committee appointed by the Council to investigate the same, or to make such inquiry, or the committee before which any such question arises, may cause to be issued a summons signed by its chairman requiring any person to appear before such committee for the purpose of giving evidence on the facts or question under inquiry, and also, if deemed expedient, to produce any papers or documents in his possession or under his control, bearing upon such question or inquiry, and described in such summons.