4.116—Interrogatories to parties; inspection of documents; admission of facts.
Under appropriate circumstances, but not as a matter of course, the Board will entertain applications for permission to serve written interrogatories upon the opposing party, applications for an order to produce and permit the inspection of designated documents, and applications for permission to serve upon the opposing party a request for the admission of specified facts. Such applications shall be reviewed and approved only to the extent and upon such terms as the Board in its discretion considers to be consistent with the objective of securing just and inexpensive determination of appeals without unnecessary delay, and essential to the proper pursuit of that objective in the particular case.