The Chief Electoral Officer, Nalini Netto, on Wednesday said Union and State ministers and political leaders who have arrived from other places to campaign for the by-election should leave the constituencies by 5 p.m. on Thursday, when the campaign ends.

All advertisements, rallies and public meetings should also come to an end by the time, she said.

Any kind of public campaign using loudspeakers or audio-visual media like television channels or radio would invite legal action, Ms. Netto said in a press release.

Meanwhile, 170 voting machines needed for the by-election were made ready and shifted to the strong room on Wednesday.

Of this, 137 would be used in election booths, the rest being kept in reserve.

These voting machines, kept under heavy security, would be handed over to the polling officials on Friday morning.

Ballots were also installed in the voting machines at Maharaja’s College under the supervision of returning officer K. N. Ravindran and the assistant returning officer S. Jayalakshmi.

Representatives of the candidates were also present on the occasion. The control units were also attached to the machines.

Polling officials were given training on Wednesday at the college auditorium. Chief election observer Badri Narayandas led the training.

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