Rule 4313. Notice. Except where the reference is to a judicial hearing
officer or a special referee, upon the entry of an order of reference,
the clerk shall send a copy of the order to the referee. Unless the
order of reference otherwise provides, the referee shall forthwith
notify the parties of a time and place for the first hearing to be held
within twenty days after the date of the order or shall forthwith notify
the court that he declines to serve.