On May 7 the Board of Directors approved a new membership fee structure. (Amended May 30, 2015.)
| U.S. and Canada Regular Membership | $40 |
| Other Countries Regular Membership | $45 |
| Lifetime Membership, Under 60 | $750 |
| Lifetime Membership, Over 60 | $675 |
Student ($15), Additional Household ($10 each), and Patron ($75) membership levels will remain unchanged.
The new rates will go into effect on October 1, 2015.