<s>[INST] How was Uttar Pradesh reorganized by the Uttar Pradesh Reorganisation Act, 2000? [/INST] Uttar Pradesh was reorganized by the Uttar Pradesh Reorganisation Act, 2000 through a change in numbering system. The original entry for "Uttar Pradesh" was replaced with "34", and then re-numbered as "11" under this Act. The change took effect on 9th November, 2000. </s>