Sec. 1.258  Closing of the hearing.

    The record of hearing shall be closed by an announcement to that 
effect at the hearing by the presiding officer when the taking of 
testimony has been concluded. In the discretion of the presiding 
officer, the record may be closed as of a future specified date in order 
to permit the admission into the record of exhibits to be prepared: 
Provided, The parties to the proceeding stipulate on the record that 
they waive the opportunity to cross-examine or present evidence with 
respect to such exhibits. The record in any hearing which has been 
adjourned may not be closed by such officer prior to the day on which 
the hearing is to resume, except upon 10 days' notice to all parties to 
the proceeding.