Candidates are required to file their nomination papers with the Electoral Commission. Then, a list of candidates is published. The polling is held between 7:00 am and 6:00 pm. The Collector of each district is in charge of polling. Government employees are employed as poll officers at the polling stations. Electronic Voting Machines (EVM) are being used instead of ballot boxes to prevent election fraud. After the citizen votes his or her left index finger is marked with indelible ink. This practice was instituted in 1962.