translate English to French: The bids for both contracts were evaluated at a meeting held on 23 April 1991 and the new contracts were signed and commenced on 7 May 1991, the old contracts having expired the previous day.
Les offres ont été examinées à une réunion tenue le 23 avril 1991 et les nouveaux contrats ont été signés et ont pris effet le 7 mai 1991, les deux contrats initiaux ayant expiré la veille.