Before the war, Sejdiu was an early protester against Yugoslav authoritarian rule and engaged in parallel institutions of the movement for liberation. During this time, he was member of Central Commission for the Referendum for Independence of Kosovo (organised on September 1991). During the period 1992-98 and 1998-2001, he was elected as member of Parliament of the Republic of Kosovo, serving as Secretary General of Parliament and Chairman of the Constitutional Commission. Sejdiu had for many years in his academic office a portrait depicting himself and fellow political party leader Veton Surroi locking arms before the riot police. He has always been widely admired for being honest and fair in all his political dealings.