A training for the zonal officers on the norms for fair polling was held at the Collectorate here on Saturday. Collector, A. Suganthi, said the zonal officials would in turn explain the guidelines to the booth officials on April 3. She spoke on the procedure to be adopted for communicating through SMS from the booths. M.S. Muthusamy, Superintendent of Police and G.S. Ramadoss, District Revenue Officer were present.