88. The judges of the Supreme Court shall be entitled to such salaries and allowances including allowances for expenses of equipment and traveling upon and to such rights in respect of leave and pension may from time to time be fixed by or under Act of the Federal Parliament, and until they are so fixed shall be entitled to such salaries, allowances, rights in respect of leave of absence or pension as are specified in the Second Schedule to this Constitution :
Provided that neither the salary of a judge nor his rights in respect of leave of absence or pension shall be varied to his disadvantage after his appointment.