The foregoing provisions, so far relevant to the present enquiry, may be summarized thus: An operator of a stage carriage may apply for renewal of his permit not less than 60 days before the date of its expiry; the said application will be disposed of as if it were an application for a permit and he will be given preferential treatment, the other conditions being equal; the Act does not prescribe any outer limit for disposal of the application for renewal of a permit, for its disposal would depend upon the applications filed by others and the time required for complying with the conditions laid down in section 57; but the requirement that the application shall be filed not less than 60 days before the date of the expiry, the injunction that pending an application for 638 renewal of a permit, temporary permit shall not be given more than once and the time limit of four months for a temporary permit fixed in section 62 indicate that, though there is no statutory prohibition, the application is expected to be disposed of ordinarily before the term of the, permit expired or, in case of unavoidable delay, within a reasonable time thereafter; after a scheme has been approved, if the State Transport Undertaking applies for a permit, the Regional Transport Authority shall issue the permit to it and for the purpose of giving effect to the approved scheme the said Authority is authorized to refuse to entertain an application for renewal of any other permit or cancel or modify any existing permit; if the Regional Transport Authority cancels or modifies a permit, compensation is, payable to the operator affected.