<s>[INST] When were entries relating to Manipur and Tripura omitted and renumbered in the context of the North-Eastern Areas (Reorganisation) Act, 1971? [/INST] The entries relating to Manipur and Tripura were omitted and renumbered as entries 2 to 7 by the North-Eastern Areas (Reorganisation) Act, 1971 on 21st January, 1972. </s>