a supporting letter listing reason for selection shall accompany the abstract forn., c. The Atomic Energy Commission shall return the complet abstract folder file with signatory approval indicating concurrence of Contractor's selection of successful bidder. One copy of the bid abstract sheet shall be retained by the AEC for reference file. d. Exceptions and recommended changes of awards (at the option of the Atomic Energy Commission) shall-be noted by separate memorandum letter, a copy of which shall be attached to the abstract folder file upon return of same. e. A separate transmittal file shall be maintained covering the mailing and return receipt of the abstract file folder reflecting purchase order file number and date of transmittal. f. Notification of awards to awardee shall be handled in the same manner as purchases of the Purchase Level Class C. C. FORMAL PURCHASE ORDER -- COMPILATION l. Purchase orders shall be written from bidder's bid quotation. 2. Purchase orders shall be visually proof read to the vendor's bid sheet to assure accuracy prior to printing and mailing purchase order to the vendor. SPECIAL CLAUSES AND PROVISIONS (a) Special Escalator on Price Clauses (1) (b) While firm prices are favored, it may be necessary to accept the current and normal commercial sales practice of applying escalator price clause. Special Tax Clauses (1) All purchase orders shall contain California Sales Tax Exemption Certificate Number. (c) Returnable Reel Containers Wherever Applicable (d) (e) Other Special Clauses Necessitated by Sales Terms and/or Agreements Governmental TS Conctract Reference Numbers Shall Be Initialed and Shown Whenever Used. 13-43