(a) whether the Government has fixed any tenure for the post of Chairman, Central Board of Direct Taxation (CBDT) and Central Board of Excise and Customs (CBEC) under Department of Revenue, if so, the details thereof;
(b) whether there is any policy guidelines issued for the grant of extension of service to officers of the Government of India, if so, the details thereof;
(c) whether the Chairman, CBDT has been given extension of service after the superannuation age; and
(d) if so, the reasons for the grant of such extension?