For a short time the territory maintained certain degree of autonomy. The former Kingdom of Poland continued to use the Polish currency (z?oty) and the Administrative Council retained some of its privileges (although it was directly controlled by the Russian governor Field Marshal Ivan Paskevich). However, by 1832 the currency and the customs border were abolished, as was the metric system and the Polish penal code (which was replaced by the Russian penal code, de facto in use since the Uprising began). Also the Catholic Church was persecuted and most monasteries were closed and nationalized. In 1839, following the Synod of Polotsk, the Greek Catholic Church disbanded itself and united with the Russian Orthodox Church.
After 1837 all voivodeships that constituted the Kingdom of Poland were turned into gubernias and became an integral part of Russian administrative division, ruled directly by the Russian tsars.
a^ Sources agree that after the fall of the January Uprising in 1864, the autonomy of Congress Poland was drastically reduced. However, they disagree on whether the state of the Kingdom of Poland (colloquially known as Congress Poland) was officially replaced by the Vistula land as a province of the Russian Empire, as many sources still use the term Congress Poland for the post-1864 period. The sources are also unclear as to when the Kingdom of Poland (or Vistula land) officially ceased to exist; some argue it ended with the assumption of control by the German and Austro-Hungarian occupying authorities; others, that it ended with the proclamation of the Regency Kingdom of Poland in 1916; finally, some argue that it occurred only with the creation of the independent Second Polish Republic in 1918. Examples:
Polish Academy of Sciences, Institute of Geographical and Spatial Organization, p. 539, 
(in Polish)Mimo wprowadzenia oficjalnej nazwy Kraj Przywi?la?ski terminy Królestwo Polskie, Królestwo Kongresowe lub w skrócie Kongresówka by?y nadal u?ywane, zarówno w j?zyku potocznym jak i w niektórych publikacjach.
(in English)Despite the introduction of the official name Vistula Land, terms such as, Kingdom of Poland, Congress Poland, or in short Kongresówka were still in use, both in everyday language and in some publications.
(in Polish) "Królestwo Polskie po powstaniu styczniowym: Nazw? Królestwa Polskiego zast?pi?a, w urz?dowej terminologii, nazwa Kraj Przywi?la?ski." [...] "Po rewolucji 1905-1907 w Królestwie Polskim ..." [...] "W latach 1914-1916 Królestwo Polskie sta?o si?...".
(in English) "Kingdom of Poland after the January Uprising: the name Kingdom of Poland was replaced, in official documents, by the name of Vistula land." However the same article also inconsistently states: "After the revolution 1905-1907 in the Kingdom of Poland" and "In the years 1914-1916 the Kingdom of Poland became...".
(in Polish)1915-18 pod okupacj? niem. i austro-w?giersk?; K.P. przesta?o istnie? po powstaniu II RP (XI 1918).
(in English)[Congress Poland was] under German and Austro-Hungarian occupation from 1915 to 1918; K.P [abbreviation for Królestwo Polskie (Kingdom of Poland)] was finally abolished after the creation of the Second Polish Republic in November 1918
^The name of the kingdom was changed to Vistula Land, which was reduced to a tsarist province; it lost all autonomy and separate administrative institutions. Richard C. Frucht, Eastern Europe: An Introduction to the People, Lands, and Culture. 2005
^The name of the territory, which had been Congress Poland, was changed to the more innocuous Vistula Land. Vistula Land was administered by Russians; Alison Fleig Frank, Oil Empire: Visions of Prosperity in Austrian Galicia , 2005
^The name of Poland ceased to be used by the Russian authorities, who designated the region once occupied by the kingdom as the "Vistula Country", John Clark Ridpath: Ridpath's History of the World: Being an Account of the Principal Events in ... 1910
^Wojciech Bartel et al. Historia pa?stwa i prawa Polski. Juliusz Bardach i Monika Senkowska-Gluck (ed.). T. III: od rozbiorów do uw?aszczenia. Warszawa: Pa?stwowe Wydawnictwo Naukowe, 1981, p. 67. ISBN83-01-02658-8
^Andrzej Szwarc. Od Wielopolskiego do Stronnictwa Polityki Realnej zwolennicy ugody z Rosj?, ich pogl?dy i próby dzia?alno?ci politycznej (1864-1905). Warszawa: Wydzia? Historyczny UW, 1990, pp. 208-209.
Manfred Alexander: Kleine Geschichte Polens. Stuttgart: Reclam 2003 (Quelle)
Roman Dmowski: Deutschland, Rußland und die polnische Frage (Auszüge). In: Polen und der Osten. Texte zu einem spannungsreichen Verhältnis. Hrg. Andrzej Chwalba, ISBN3-518-41731-2 (Denken und Wissen. Eine Polnische Bibliothek. Band 7)
Hensel, Jürgen (ed.): Polen, Deutsche und Juden in Lodz 1820 - 1939. Eine schwierige Nachbarschaft, Osnabrück: fibre Verlag 1996