1931, Sławek resigned from his post, to be replaced by Aleksander Prystor. Sławek then devoted his time to writing a new Constitution of Poland, together with Kazimierz Świtalski and Stanislaw Car. The April Constitution of Poland was passed by the act of the Sejm on 23 April 1935. It introduced in Poland a presidential system with certain elements of authoritarianism. On March 28, 1935, Sławek for the third time was named Prime Minister of Poland. On July 13, President Ignacy Mościcki awarded him with the Order of the White Eagle (Poland), for his work on the new Constitution. Since Sławek regarded himself as the new leader of Poland after the death of Józef Piłsudski (May 12, 1935), President Mościcki decided to make a pact with Edward Rydz-Śmigły, in order to sideline Sławek and remove him from the government. In the second half of 1935, Sławek began to lose his position, to resign on October 12, 1935. Furthermore, on October 30 he decided to dissolve the BBWR. Soon afterwards, Ignacy Mościcki offered the seat of Prime Minister to Sławek, on the condition that Eugeniusz Kwiatkowski becomes his deputy. Sławek refused, and as a result, Marian Zyndram-Kościałkowski was named the new premier. On August 15, 1935, deputies and senators of BBWR handed to Sławek a privately purchased manor house, located in the village of Janowiczki, near the site of the Battle of Racławice. Late 1930s Walery Sławek planned to replace the dissolved BBWR with a new structure, called Common Organization of the Society (Powszechna Organizacja Społeczeństwa). His idea was harshly criticized by Edward Rydz-Śmigły, who sent to him a letter writing that there is no need for such a body to be formed. On May 24, 1936, Sławek was replaced by Adam Koc, who became new chairman of the Association of Polish Legionnaires. A few weeks later, he was named chairman of the Józef Piłsudski Institute of Modern History, a post, designed to keep him away from political life. This nomination was purely honorary and marked Sławek's decline. On November 11, 1936, President Mościcki nominated Edward Rydz-Śmigły to the post of Marshal of Poland. Most of the so-called Piłsudski's Colonels refused presidential invitation to this event. Sławek himself decided to accept the invitation, but later stated that his promotion to Marshal was one of the saddest days of his life, as he was of the opinion that Józef Piłsudski was the only