INTERNATIONAL   EARTH   ROTATION   SERVICE   (IERS) 
                     SERVICE INTERNATIONAL LA ROTATION  TERRESTRE


BUREAU CENTRAL DE L'IERS
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: iers@obspm.fr                                 Paris, 17 December 1997

                                                        Bulletin D 73





                               ANNOUNCEMENT OF DUT1


         From the

                               19 February 1998, 0h UTC

until further notice, the value of DUT1 to be disseminated with the time signals
will be


                                  DUT1 = + 0.1s
                                  

         Bulletin D 74 should be issued in February 1998.