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Regular Members: individuals interested in limnology who pay full dues.
Regular Members Dev Co: regular members from developing countries, who pay 50% of full dues.
Student Members: students (all countries) working toward a graduate or post-graduate degree. Student status is limited to a max of 6 years.
Early Career Members: professionals within the first 5 years after completion of their highest degree, who pay 50% of the dues in their country. Early Career status is limited to a maximum of 5 years.
Early Career Members Dev Co: same as above for members from developing countries.
Emeritus Members: individuals who retired and are in good standing with SIL for 20 + years, request emeritus status and are approved by the Executive Board. Emeritus members can choose to pay 50% dues and receive free on-line access to Inland Waters and the SIL Proceedings and Communications (category B), or pay no dues and receive no free on-line journal access (category A).
Emeritus Members Dev Co: same as above for Emeritus Members from developing countries, with a further 50% discount on annual dues.
Family members: couples wishing to share a joint license to free on-line access to publications. If one person is a member at the full rate, then the partner may be a member at 50% membership fee rate.