As may have been mentioned, the franchise for these referendums (as well as provincial elections in NC) is restricted. Basically, those born outside New Caledonia and who immigrated to New Caledonia over the past decades don't have the right to vote.
Those registered to vote in the referendum needed to meet at least one of the following criteria:
- Registered to vote or fulfilling conditions to be registered to vote in the 1998 referendum on the Nouméa Accord, i.e. 10 years residence between 1988 and 1998
- Not meeting residency requirements in the 1998 referendum, if you can justify that your absence was for family, professional or medical reasons
- Have had civil customary status or, born in New Caledonia, have the 'centre of their moral and material interests' there
- Have one parent born in NC and having the 'centre of their moral and material interests' there
- Able to justify 20 years continuous residence in NC by 31 Dec. 2014
- Born before 1989, and having resided in NC between 1988 and 1998
- Born after 1989, and having one parent able to vote in the 1998 referendum
New Caledonia therefore has three electoral lists: the general list (used for 'French' elections), the provincial list (for elections to provincial assemblies and Congress) and the special list for the referendum.
Thankfully, because of the municipal elections this year, held under the general list in New Caledonia, we can get a rather accurate picture of how many people are excluded from voting in the indyrefs. Granted, EU citizens can also vote in municipal elections but I doubt there are that many of them registered, particularly here. According to my estimates, there are 32,425 voters on the general roll who cannot vote in the referendums. That's 15.2% of registered voters who are not on the referendum list.
So here is a map which shows the percentage of those on the general list (as of March 2020) excluded from the special referendum list.
Of these 32,425 'excluded' voters, the vast majority - 94.7% - are in the Province Sud. 59.5% of 'excluded' voters are in Nouméa alone. For comparison, 64.8% of registered voters for the referendum were in that province, and 69.4% of general list voters in March 2020 were in that province. Only 1,731 voters in the other two provinces, which have overwhelmingly nationalist majorities and a largely Kanak population, were 'excluded' from the referendum list.
Nouméa is the commune with the most excluded voters - 27.1% of those who could vote in March 2020 couldn't last Sunday. The other communes in the Grand Nouméa also have high percentages of excluded voters: 17.3% in Dumbéa, 16.9% in Mont-Dore and 18.9% in Païta. Pouembout, in Province Nord, has the most excluded voters outside of the Nouméa metro at 13.4%. On the other hand, in most overwhelmingly Kanak communes, the percentage of excluded voters is insignificant - below 1% in many cases. Kaala-Gomen (75.9% Yes) even had the same number of registered voters in March and October 2020.