<Tr> <Td> <Ul> <Li> Preamble </Li> </Ul> <P> with the words "socialist" and "secular" added to it in 1976 by the 42nd constitutional amendment . </P> <Ul> <Li> Part I--Union and its Territory </Li> <Li> Part II--Citizenship . </Li> <Li> Part III--Fundamental Rights </Li> <Li> Part IV--Directive Principles of State Policy </Li> <Li> Part IVA--Fundamental Duties </Li> <Li> Part V--The Union </Li> <Li> Part VI--The States </Li> <Li> Part VII--States in the B part of the First schedule (repealed) </Li> <Li> Part VIII--The Union Territories </Li> <Li> Part IX--The Panchayats </Li> <Li> Part IXA--The Municipalities </Li> <Li> Part IXB--The Co-operative Societies . </Li> <Li> Part X--The scheduled and Tribal Areas </Li> <Li> Part XI--Relations between the Union and the States </Li> </Ul> </Td> <Td> <Ul> <Li> Part XII--Finance, Property, Contracts and Suits </Li> <Li> Part XIII--Trade and Commerce within the territory of India </Li> <Li> Part XIV--Services Under the Union, the States </Li> <Li> Part XIVA--Tribunals </Li> <Li> Part XV--Elections </Li> <Li> Part XVI--Special Provisions Relating to certain Classes </Li> <Li> Part XVII--Languages </Li> <Li> Part XVIII--Emergency Provisions </Li> <Li> Part XIX--Miscellaneous </Li> <Li> Part XX--Amendment of the Constitution </Li> <Li> Part XXI--Temporary, Transitional and Special Provisions </Li> <Li> Part XXII--Short title, date of commencement, Authoritative text in Hindi and Repeals . </Li> </Ul> </Td> </Tr> <Ul> <Li> Preamble </Li> </Ul> <P> with the words "socialist" and "secular" added to it in 1976 by the 42nd constitutional amendment . </P> <Ul> <Li> Part I--Union and its Territory </Li> <Li> Part II--Citizenship . </Li> <Li> Part III--Fundamental Rights </Li> <Li> Part IV--Directive Principles of State Policy </Li> <Li> Part IVA--Fundamental Duties </Li> <Li> Part V--The Union </Li> <Li> Part VI--The States </Li> <Li> Part VII--States in the B part of the First schedule (repealed) </Li> <Li> Part VIII--The Union Territories </Li> <Li> Part IX--The Panchayats </Li> <Li> Part IXA--The Municipalities </Li> <Li> Part IXB--The Co-operative Societies . </Li> <Li> Part X--The scheduled and Tribal Areas </Li> <Li> Part XI--Relations between the Union and the States </Li> </Ul>

Why was 26 january chosen as the date for the implementation of the indian constitution