The Election Commission has sought withdrawal of tax exemption benefits to ten political parties from the Central Board of Direct Taxes, CBDT. The step has been taken on the grounds that they failed to submit their mandatory expenditure contribution reports for the financial year 2012-13 on time to the poll body.The EC, in its latest communication, has asked the CBDT to take action against the defaulting parties under the provisions of of the Representation of the People Act in consonance with I-T laws.