511.21—Prehearing conferences.
(a) When held.
(1)
A prehearing conference shall be held in person or by conference telephone call, except in unusual circumstances, approximately fifty (50) days after publication in the Federal Register of the complaint, upon ten (10) days notice to all parties and participants, to consider any or all the following:
(viii)
Limitation of the number of witnesses, particularly the avoidance of duplicate expert witnesses;
(ix)
Matters of which official notice will be taken and matters which may be resolved by reliance upon findings of other Federal agencies; and