Membership in WNYSEF requires the following three things:
An annual membership fee of $10. You can download the membership application form here: Application
Membership in good standing with the AMA (Acadamy of Model Aeronautics)
Registration with the FAA. You can register here: FAA Registration
Note: Membership in WNYSEF is not required to fly at their events, but membership in the AMA and FAA registration IS.