<Tr> <Th> Enacted by </Th> <Td> Lok Sabha </Td> </Tr> <Tr> <Th> Date passed </Th> <Td> 15 December 1989 </Td> </Tr> <Tr> <Th> Enacted by </Th> <Td> Rajya Sabha </Td> </Tr> <Tr> <Th> Date passed </Th> <Td> 20 December 1989 </Td> </Tr>

When did the age to vote change from 21 to 18