No trial shall be continued on account of the absence of any witness unless a subpoena for
the attendance of such witness has been served at least seven (7) days prior to the date set
for trial. This rule shall not dispense with the obligation to take the deposition of any
witness where the party requiring his/her attendance, or counsel, knows that such witness
intends to be absent from the district at the time of the trial, or where such witness is not
subject to subpoena within this jurisdiction.