(a) whether the Directorate General of Civil Aviation (DGCA) is aware that some airlines have increased their tariffs during the last three years;
(b) if so, the number of times air fares have been increased during the said period, airlines-wise and the percentage thereof;
(c) whether the DGCA/Government proposes to appoint an Aviation Regulator for fixing the air fares; and
(d) if so, the details thereof?