INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. 33 (0) 1 40 51 22 26 FAX 33 (0) 1 40 51 22 91 Internet: services.iers@obspm.fr Paris, 23 October 2007 Bulletin D 98 ANNOUNCEMENT OF DUT1 From the 29 November 2007, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = -0.3 s Bulletin D 99 should be issued in January 2008