TNAG-0836-FCO40-1044-Comprehensive-Test-Ban-Treaty-national-seismic-stations-on-U-1979 — Page 27

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CONFIDENTIAL

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CONFIDENTIAL

FM F C 0 1009152 FEB 79

TC OUTINE ST HELENA

TELEGRAM NUMBER 52 OF 10 FEBRUARY,

AND TO MODUK (DS11 FOR NORBURY).

No 13/2. Be

GRAND TURK (PERSONAL)

AND SAVING TO PORT STANLEY GRAND CAYMAN ANGUILLA (PERSONAL) TORTOLA (PERSONAL) BELMOPAN (PERSONAL) GIBRALTAR (PERSONAL) NICOSIA MONTSERRAT (PERSONAL) HAMILTON (PERSONAL) HONG KONG

HONG KONG WELLINGTON (FOR GOVERNOR PITCAIRN) ATHENS WASHINGTON MOSCOW UKMIS GENEVA (FOR CTB DEL).

11

ANKARA

See (16

TO ALL) : COMPREHENSIVE TEST BAN

PERSONAL FOR/GOVERNOR/H M COMMISSIONER. MY TEL NO 51 TO ST HELENA (NOT TO ALL) TREATY (CTB).

1. SINCE JULY 1977 WE HAVE BEEN NEGOTIATING WITH THE RUSSIANS AND AMERICANS FOR A CTBT THAT WILL BAN ALL NUCLEAR TESTS, INITIALLY FOR 3 YEARS. ASSUMING SATISFACTORY COMPLETION OF THESE NEGOTIATIONS THE TREATY COULD ENTER INTO FORCE IN 1980. IT WILL APPLY EQUALLY TO THE UK AND HER DEPENDENT TERRITORIES (AS DOES THE PARTIAL TEST BAN TREATY OF 1963). THIS TELEGRAM IS TO GIVE ADVANCE WARNING OF ONE OF THE VERIFICATION PROVISIONS AND TO SEEK YOUR VIEWS.

2. THERE WILL BE PROVISION FOR A TREATY PARTY TO REQUEST AN ON- SITE INSPECTION (OSI) ON THE TERRITORY OF ANOTHER PARTY, IF IT CAN SHOW GOOD REASON TO BELIEVE THAT A NUCLEAR EXPLOSION MAY HAVE TAKEN PLACE IN VIOLATION OF THE TREATY. THE PROVISION FOR OSI WILL BE DESIGNED TO DISCOURAGE FRIVOLOUS OR HARRASSING REQUESTS. OST WILL BE BASED ON THE SO-CALLED VOLUNTARY OR CHALLENGE PRINCIPLE, SO THAT A PARTY WILL BE ABLE TO TURN DOWN A REQUEST. BUT IT WILL BE UNDER- STOOD THAT REFUSAL OF A PROPERLY SUBSTANTIATED REQUEST FOR AN OS!

WOULD BE A SERIOUS POLITICAL ACT.

3. THIS RIGHT TO REQUEST AN OSI WILL BE AVAILABLE TO ALL PARTIES TO THE TREATY AND THE DETAILED ARRANGEMENTS FOR AN INSPECTION WILL BE AGREED ON AN AD HOC BASIS AFTER ANY SUSPECTED VIOLATION OF THE TREATY HAS TAKEN PLACE. HOWEVER, IN THE CASE OF OSI BETWEEN THE UK, THE US AND THE SOVIET UNION, WE NEED MORE PRECISE ARRANGEMENTS. THESE ARE BEING NEGOTIATED IN ADVANCE, AS PART OF A TRIPARTITE QUOTE SEPARATE VERIFICATION AGREEMENT UNQUOTE WHICH WILL COME INTO

FORCE AT THE SAME TIME AS THE TREATY,

CONFIDENTAL

14.

CH. IF WE

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