At present there are about 350 active members on roll, representing 22 countries.

Membership is open to all persons, firms, or corporate bodies interested in the objectives of the Society. A complementary one-year honorary membership is available by registering as a member at the annual meeting. The dues for individual and corporate sustaining membership are available for US$100.00 per year. Individual and sustaining members receive the newsletter and the proceedings of the Annual Meetings. Separate institutional membership is not available, but institutions may subscribe to the newsletter for a fee of US$30.00.

Membership may be categorized as follows:

  • Active Membership
  • Life Membership
  • Honorary Membership
  • Emeritus Membership
  • Sustaining Membership