As mentioned in the EAA submission rules (http://www.eaacongress.org/r/submission_rules), authors who want to submit a paper must be EAA members in the year of the congress for which they submit. If you want to submit a paper for the EAA Annual Congress 2020 and you are not yet an EAA member 2020, you have to subscribe for membership 2020 before being allowed to submit.
To download the Submission Guidelines, please clickHERE.