1-nzl, 2-nzl, 3-irl, 4-fin, 5-nzl, 6-usa, 7-rsa, 8-rsa, 9-rsa, 10-cro, 11-cro, 12-fra, 13-rsa, 14-rsa, 15-rsa, 16-ger, 17-usa, 18-esp, 19-fra.
For instance: for New Zealand to send a 5th skipper, there must be 1 spot declined from the allocations currently listed. For Finland to send a 3rd skipper, there must be 4 spots declined from the allocations currently listed.
If I have figured this out wrong, please don't hesitate to correct me.

Has the ESC sent out their guest invitations yet? If so, who, and what kind of response has been received?
I also noticed Japan is not included in Stage 1. What happened?