According to Section 14 (b) of the Representation of People Act, 1950 the relevant date (qualifying date) for determining the age of an applicant is the first day of January of the year in which the electoral roll after revision is finally published. For example, if you have completed or are completing 18 years of age on any date from and after 2nd January 2013 but upto to 1st January 2014, you will be eligible for registration as a voter in the elector roll going to be finally published in January, 2014