League of Estonian Corporations (Estonian: Eesti Korporatsioonide Liit, Estonian acronym: EKL) is an organisation that unites all-male academic corporations in Estonia. It was founded on March 28, 1915 by Vironia, Fraternitas Estica, Sakala, Ugala and Rotalia
Corporation Ugala suspended its membership on May 10, 2008.
League of Estonian Corporations Wikipedia
Wäinla and Fraternitas Ucuensis are both members, but they are not active in Estonia.