Sec. 6. (a) Witnesses may be required to appear and testify in the proceeding provided for in this chapter.
(b) Either party may examine the other as a witness in the same manner as upon the trial of an issue, or the plaintiff may waive the answer of the debtor and rely upon other testimony.
(c) All examinations and answers under this section shall be made on the oath of the party. However, when a corporation answers, the answers shall be on the oath of an officer of the corporation.