(2)A [Regional Transport Authority, State Transport Authority or any prescribed authority referred to in sub-section (1) of section 66] shall not ordinarily refuse to grant an application for permit of any kind made at any time under this Act:Provided that the [Regional Transport Authority, State Transport Authority or any prescribed authority referred to in sub-section (1) of section 66] may summarily refuse the application if the grant of any permit in accordance with the application would have the effect of increasing the number of stage carriages as fixed and specified in a notification in the Official Gazette under clause (a) of sub-section (3) of section 71 or of contract carriages as fixed and specified in a notification in the Official Gazette under clause (a) of sub-section (3) of section 74:Provided further that where a [Regional Transport Authority, State Transport Authority or any prescribed authority referred to in sub-section (1) of section 66] refuses an application for the grant of a permit of any kind under this Act, it shall give to the applicant in writing its reasons for the refusal of the same and an opportunity of being heard in the matter.