INTERNATIONAL EARTH ROTATION SERVICE (IERS) SERVICE INTERNATIONAL LA ROTATIO TERRESTRE BUREAU CENTRAL DE L'IERS OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. (33) 1-40 51 22 26 Telex : 270776 OBS Internet : iers@obspm.fr Paris, 2 August 1996 Span : MESIOA::SERVICES FAX : (33) 1 - 40 51 22 91 Bulletin D 63 ANNOUNCEMENT OF DUT1 From 3 October 1996, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = 0.0 s Bulletin D 64 should be issued in October 1996.