; and (2) shall notify the Director of the Administrative Office of the United States Courts of the election made under paragraph (1). 10. Seniority of judges The seniority of each judge who is assigned under section 8 or elects to be assigned under section 9 shall run from the date of commission of the judge as a judge of the former ninth circuit. 11. Application to cases The following apply to any case in which, on the day before the effective date of this Act, an appeal or other proceeding has been filed with the former ninth circuit: (1) Except as provided in paragraph (3), if the matter has been submitted for decision, further proceedings with respect to the matter shall be had in the same manner and with the same effect as if this Act had not been enacted. (2) If the matter has not been submitted for decision, the appeal or proceeding, together with the original papers, printed records, and record entries duly certified, shall, by appropriate orders, be transferred to the court to which the matter would have been submitted had this Act been in full force and effect on the date on which the appeal was taken or other proceeding commenced, and further proceedings with respect to the case shall be had in the same manner and with the same effect as if the appeal or other proceeding had been filed in that court. (3) If a petition for rehearing en banc is pending on or after the effective date of this Act, the petition shall be considered by the court of appeals to which the petition would have been submitted had this Act been in full force and effect on the date on which the appeal or other proceeding was filed with the court of appeals. 12. Temporary assignment of circuit judges among circuits Section 291 of title 28, United States Code, is amended by adding at the end the following: (c) The chief judge of the Ninth Circuit may, in the public interest and upon request by the chief judge of the Twelfth Circuit, designate and assign temporarily any circuit judge of the Ninth Circuit to act as circuit judge in the