(4)Every member of the flight crew shall certify the accuracy of the entries in his log book with respect to flight time at least at the end of each calendar month. The pilot-in-command during dual instruction shall certify entries with respect to flight time during such dual instruction. At the end of every quarter in a year, that is, at the end of March, June, September and December, log books shall be certified for correctness of entries therein,--(a)by competent authorities, such as the Operations Manager, Deputy Operations Manager, or Chief Pilot of the [Air Transport Undertaking] concerned, in the case of professional pilots,(b)by the Chief Flying Instructor, in the case of members of the [Flying Training Orginasation] [Substituted 'Club' by Notification No. G.S.R. 481(E), dated 15.5.2017 (w.e.f. 23.3.1937).], and(c)[ by Officers designated by Director-General of Civil Aviation in the case of all other persons.] [Substituted by G.S.R. 637(E), dated 4.10.1993. ]
