Thanks to popular support within Poland, as well as to international support and media coverage, the Gdańsk workers held out until the government gave in to their demands. On August 21 a Governmental Commission ("Komisja Rządowa") including Mieczysław Jagielski arrived in Gdańsk, and another one with Kazimierz Barcikowski was dispatched to Szczecin. On August 30 and 31, and on September 3, representatives of the workers and the government signed an agreement ratifying many of the workers' demands, including the right to strike. This agreement came to be known as the August or Gdańsk agreement ("Porozumienia sierpniowe"). Other agreements were signed in Szczecin (the Szczecin Agreement of August 30), and Jastrzębie-Zdrój on September 3. It was called the Jastrzębie Agreement ("Porozumienia jastrzebskie") and as such is regarded as part of the Gdańsk agreement. Though concerned with labor-union matters, the agreement enabled citizens to introduce democratic changes within the communist political structure and was regarded as a first step toward dismantling the Party's monopoly of power. The workers' main concerns were the establishment of a labor union independent of communist-party control, and recognition of a legal right to strike. Workers' needs would now receive clear representation. Another consequence of the Gdańsk Agreement was the replacement, in September 1980, of Edward Gierek by Stanisław Kania as Party First Secretary.