The DXCC entity of Temotu Province was added to the DXCC Entities list in November 1998, with QSOs counting from 1998-03-31 @23:59z


DXCC Notes in QST November 1998 reports:

"The ARRL Awards Committee has accepted a recommendation of the DXCC Advisory Committee to add Temotu Province of the Solomon Islands to the DXCC List The addition will be effective with contacts made beginning 2359 UTC on March 31, 1998 and after.


Temotu Province includes the Santa Cruz, Reef, Duff and Vanikolo Islands groups.  They are located more than 356 kilometers from the main grouping of the Soloman Islands."


Location and Islands map (credit: George, Marianne. (2018). Experiencing mana as ancestral wind-work. Time and Mind. 11. 385-407. 10.1080/1751696X.2018.1541126. )


These islands are also known as the Santa Cruz Islands




Prefix:  H40


Ranking in "Most Wanted" league.


Whitelisting

Temotu Province is a whitelisted DXCC entity. The following table lists stations known to have been QRV from <> Islands and which are thought to be good for DXCC credit.
The callsigns below are the only ones that Club Log will map to Temotu Province. These callsigns have been taken from QSL cards and other sources.
Callsigns that are not listed below, or QSOs outside the exception date range, will be not be mapped to Temotu Province but will be mapped as INVALID.
Please advise any missing valid Temotu Province  callsigns to Alan, 5B4AHJor via the Help Desk.


CallDate/Note (Check the callsign in Call Tester to see exact dates, QSLs and additional notes) 
H40AA1998 - March/April
H40AB1998 - April
H40MS
1999 - January until March
H40FN1999 - January/February
H40OO1999 - April
H40MY2000 - May
H40RW2001 - March/April
H40DX2001 - August
H40AT2001 - October
H40T, H40YL, H40ZG2002 - February/March
H40H, H40V, H40VB2003 - August
H40HL2005 - November
H40MY2007 - October
H40MY2008 - September
H40HP2009 - March QSL required
H40MS2009 - March
H40FN2009  - March
H40MS2009 - February
H40MY2009 - September
H40FK, H40FN2010 - February
H40KJ2011 - October
H40FN2012 - February
H40FN2012 - December until 2013 - January
H40T, H49YL, H40ZG2013 - March
H40IOTA2013 - August
H40FN, H40TA2013 - December until 2014 - January
H40GC2016 - October
H40DA2017 - January QSL required
H40FN2017 - March
H40GC2017 - October
H40YM2018 - February/March
H40D2018 - April
H40TT2019 - November
H40RH2023 - November
H40WA2024 - February/March (tentative dates)


The ones that didn't count
H40BQLicence issued (2011) but aparently not activated


Acknowledgements and references

Dokufunk

Hamgallery Temotu Islands Oceania H40

Les Nouvelles DX

WAP-WACA Directory

Wikipedia Temotu Province

Wikipedia 

Wikipedia