Annual INPS membership renewals are due January 1 of each calendar year and include the following categories:
Institutional (nonvoting): $20.00
Business (4 memberships): $125.00
Iliamna (life): $1000.00
Dodecatheon (life): $2000.00
Erigenia (life): $5000.00
New memberships received after October 1st of the calendar year will be good for the remainder of that year and the next year.