Subject: Bulletin C number 20
From: [email-masked]
To: [email-masked]
Date: Wed, 12 Jul 2000 10:11:29 +0200 (METDST)

INTERNATIONAL EARTH ROTATION SERVICE (IERS) 
  	       SERVICE INTERNATIONAL DE 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  : [email-masked]

                                               Paris, 12 Juillet 2000

                                               Bulletin C 20
                                
                                               To authorities responsible for                  
                                               the measurement and distribution                
                                               of time                                         

                          INFORMATION ON UTC - TAI

 No positive leap second will be introduced at the end of December 2000.
 The difference between UTC and the International Atomic Time TAI is :		
		
       from 1999 January 1, 0h UTC, until further notice : UTC-TAI = - 32 s

 Leap seconds can be introduced in UTC at the end of the months of December or
 June,  depending on the evolution of UT1-TAI. Bulletin C is mailed every six 
 months, either to announce a time step in UTC, or to confirm that there will
 be no time step at the next possible date.

                                                 Daniel GAMBIS
                                                 Director			
                                                 Central Bureau of IERS