a. All purchase orders for materials, supplies and equipment procured for the Los Angeles. Area Office use are assigned individual cost code identification numbers in accordance with the established coding procedure formulated by the Fiscal Division. NOTE: The above referenced Material Cost Coding Procedure and Charge of Accounts Index, submitted by the Fiscal Division of Holmes & Narver, Incorporated, has been approved by the Finance Division of the Santa Fe Operations Office of the U. S. Atomic Energy Commission, Los Alamos, New Mexico. D. SERVICE CONTRACTS AND SUBCONTRACTS 1. SERVICE CONTRACTS (a) Contracts for services rendered shail be handled on a purchase order basis. These services shall include janitorial service, blueprinting service, automotive service, equipment repair service, etc. (1) Invoices shall be rendered on a monthly basis. All invoices are to contain a breakdown of charges with dates charges were incurred. RENTAL AGREEMENTS (a) All property or machinery rental agreements shall be entered into with prior approval of the Atomic Energy Commission. (1) Rental agreements to be carried on separate forms other than purchase order forms. SUBCONTRACTS 13-46 (a) All subcontracts and the proposals thereof shall be at the (>) The subsequent awarding of such referenced subcontracts shall be made with prior approval of the Atomic Energy Commission. direction of the Director of Procurement.