INTERNATIONAL EARTH ROTATION SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE BUREAU CENTRAL DE L'IERS OBSERVATOIRE DE PARIS Paris, 12 January 1995 61, Av. de l'Observatoire 75014 PARIS (France) Tel. (33) 1-40 51 22 26 Telex : 270776 OBS Internet : services@obspm.fr Span : MESIOA::SERVICES FAX : (33) 1 - 40 51 22 32 Bulletin C 11 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 June 1996. The difference between UTC and the International Atomic Time TAI is : from 1996 January 1, 0h UTC, until further notice : UTC-TAI = - 30 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 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. Martine FEISSEL Director Central Bureau of IERS