The Kyustendil congress of IMARO in 1908 led to a disintegration of the organization - Yane Sandanski and Hristo Chernopeev contacted the Young Turks and started legal operation.
Initially, the group developed only propaganda activities, until Sandanski was injured by Tane Nikolov on September 24, 1908, in an attempt for the former's life.
In 1909 the group around Sandanski and Chernopeev participated in the rally of the Young Turks to Istanbul that led to the deposition of sultan Abdul Hamid II from the throne.
The representatives of 15 local organization attended the congress - H. Yankov and Dimitar Vlahov - Solun, H. Mendikarov and T. Klifov - Gorni Poroy, Stoyko Hadzhiev and Iliya Bizhev - Valovishta, Yane Sandanski and Georgi Kazepov - Melnik, S. Pashkulov and A. Bozhikov - Nevrokop, D.Koshtanov and G. Zahariev - Gorna Dzhumaya, G. Ognyanov - Maleshevsko, K. Samardzhiev and Hristo Chernopeev - Strumitsa, Pande Popmanushev - Petrich, M Goshev and D. Miraschiev - Veles, D. Daskalov and L. Lazarov - Tikvesh, I. Ilyukliev and N. Petrov - Kukush, I. Manolev - Bitolya, Y. Shurkov and F. Bayruaktarov - Skopje, Georgi Strizhovski and Elzov - Razlog, Spasov and Stambonliev - Ser, Todor Panitsa - Drama, A. Kirov - the region around Adrianople, B. Hristov - Dolni Poroy and G. Mihov - Ohrid.
A major goal of the organization was the reform of the Ottoman Empire into a federation, which included a creation of autonomous vilaets in Macedonia, Albania, Armenia.
A new central committee was formed with Dr. H. Tenchev as its president and members D. Miraschiev, Chudomir Kantardzhiev, Aleksandar Buynov and Atanas Spasov.