Operated from 1993 to 1996, possibly later, using cancellations only.
Updated 19th July 2003
Operated from 1987 onwards, issuing stamps.
Updated 30th March 2008
Operated from 1982 onwards, using a cancellation only.
Updated 24th January 2004
Operated in 2008 and for some years before, issuing stamps. .
Updated 13th December 2008
This section not yet updated.
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