In cases other than those set forth above in section 52.1 of this Part, the Authority, in connection with a pending application, may hold an investigative interview, at which the applicant and any other witnesses may be questioned under oath. Interviews may be conducted by a member of the Authority or any employee of the Authority duly designated thereby to act, who shall be known as the interviewer. The provisions set forth above concerning hearings shall not be applicable to such interviews, which are held pursuant to the Authority's investigative function for the purpose of developing facts essential to adequate consideration of the application.