Section 4. Notwithstanding anything contained in sub-section (1) of section 3, during, and in relation to, the

4. Notwithstanding anything contained in sub-section (1) of section 3, during, and in relation to, the period commencing on the appointed day and ending immediately before the commencement of this Act, the shall, in their application to appointments to any post referred to in clause (a) or clause (b) or clause (c) or to appointments for filling reserved vacancies in posts referred to in clause (d) of sub-section (2) of section 3, be deemed to have been only directory in nature as if the said Rules had been amended for the duration of the said period so as to be only directory in nature, and notwithstanding any judgment, decree or order of any court, tribunal or other authority, no appointment of any person made during that period to any such post or reserved vacancy and no action taken or thing done by or before such person shall be deemed to be illegal or void or ever to have become illegal or void merely on the ground that such appointment was not made in accordance with the .