3. Travelling allowances of a Judge travelling on duty in Bangladesh shall be determined in accordance with the provisions of sections 4 to 9. Explanation.- The expression “travelling on duty” shall include travels within Bangladesh during vacation of a Judge, not being a vacation Judge,-(a) for doing duty during vacation in the Supreme Court;(b) for performing the functions of the office or post to which he may be appointed during his period of service as Judge; and(c) for returning after doing such duty or performing such functions to the place from where the journey was undertaken for the purpose.