Article 49. In case where Japanese National Railways makes or enters into a contract for purchase, sale, loan, hire, contract for work or any such agreement, the Japanese National Railways shall publicly notify of such intended contract and invite competitive bids from the public in general, and such contract shall be awarded to the lowest or the highest bidder or to the persons on the basis of fair negotiation with competitive bidders concerning the prices and other conditions. The provision, however, shall not apply to the case where there is urgent necessity, to the case where it causes disadvantage to make a contract corresponding to the method of open competitive bid, or as provided for by Cabinet Order.