The Director of the Government Publishing Office may procure, under direction of the Joint Committee on Printing, as provided by sections 509-516 of this title, and furnish on requisition, paper and envelopes (not including envelopes printed in the course of manufacture) in common use by two or more departments, establishments, or services of the Government in the District of Columbia, and reimbursement shall be made to the Director of the Government Publishing Office from appropriations or funds available for the purpose. Paper and envelopes so furnished by the Director of the Government Publishing Office may not be procured in any other manner.