(_a_) to summon witnesses to the trial, to require their attendance and
testimony and to put questions to them;
(_b_) to interrogate any defendant who takes the stand to testify in his
own behalf, or who is called to testify regarding another defendant;
(_c_) to require the production of documents and other evidentiary
material;
(_d_) to administer oaths;
(_e_) to appoint officers for the carrying out of any task designated by
the tribunals including the taking of evidence on commission;
(_f_) to adopt rules of procedure not inconsistent with this Ordinance.
Such rules shall be adopted, and from time to time as necessary, revised
by the members of the tribunal or by the committee of presiding judges
as provided in Article XIII.