Lucknow, Feb 10 (PTI) A case was today registered against UPCC president Rita Bahuguna Joshi, who is in the fray from Lucknow Cant seat, for violating the model code of conduct by allegedly using more vehicles than the permitted number. The case was registered in Krishna Nagar police station. While campaigning in Gopalpur area, Joshi has been accused of using more vehicles than the prescribed number fixed by the Election Commission, a returning officer said. The flying squad of EC had registered a case in this regard against Joshi.