Almost two years after he retired as the Comptroller and Auditor General (CAG), Vinod Rai is set to join the Railways Ministry as an \u201chonorary advisor\u201d. During his term as CAG, Rai claimed to have \u201cunearthed\u201d largescale irregularities and \u201closs\u201d of public money in spectrum auctions and coal block allocations, causing discomfort to the then UPA government and giving plenty of ammunition to the BJP, then in the opposition. This is Rai\u2019s first formal assignment after retirement. He has been asked to advise the Railways on how to usher transparency in all processes including procurement, finances, decision-making and operations. \u201cI won\u2019t be taking any salary. I can\u2019t do that. It\u2019s honorary work. Neither will I be required to go to office every day. I have had two rounds of discussions with the minister. Now I will have discussions with Railway Board members to take things further,\u201d Rai told The Indian Express on Thursday.\u00a0 Sources said an office will be kept ready for Rai at Rail Bhawan. In December, Railways Minister Suresh Prabhu had roped in Rai for a report on transparency. The new arrangement is being seen as an extension of his earlier assignment.