Delhi CM Arvind Kejriwal on Saturday urged Union ministers, who have been given exemption under odd-even scheme, to voluntarily follow the experinment starting from April 15. Like the first phase, the AAP government has kept the Union ministers out of the ambit of second phase of the scheme. “Although Union ministers have been exempted, I urge them with folded hands to follow the scheme voluntarily as several judges, who had been given exemptions from the first round of odd-even scheme, had done,” Kejriwal said. While announcing the exemption for Union ministers Gopal Rai had said that the government does not want any “unnecessary controversy” by bringing them under ambit of the 15-day scheme.