If a party seeking to file an appeal submits a notice of appeal to the contracting officer instead of filing it using the electronic filing system, the contracting officer shall indicate thereon the date of receipt and shall forward the notice of appeal, including any envelope or other wrapping indicating the date of mailing, within 10 days to the Postal Service General Counsel's Office. A designee of the General Counsel promptly shall enter the resulting case into the electronic filing system.