Languages with official status in India
The Indian constitution, in 1950, declared Hindi in Devanagari script to be the official language of the union. Unless Parliament decided otherwise, the use of English for official purposes was to cease 15 years after the constitution came into effect, i.e., on 26 January 1965. The prospect of the changeover, however, led to much alarm in the non Hindi-speaking areas of India, especially Dravidian-speaking states whose languages were not related to Hindi at all. As a result, Parliament enacted the ,
Languages with official status in India
Communication between the union and states which use Hindi as their official language (classified by the Official Language Rules as "the states in Region A"), and with persons who live in those states, is generally in Hindi, except in certain cases. Communication with a second category of states "Region B", which do not use Hindi as their official language but have elected to communicate with the union in Hindi (currently Gujarat, Maharashtra, and Punjab) is usually in Hindi, whilst communications sent to an individual in those states may be in either Hindi or English. Communication with all other states "Region C", and with people living in them, is in English.