Notwithstanding anything contained in any judgment, decree or order of any Court, Tribunal or Authority, no levy of interest under sub-section (3) of section 32 of the Act from the first day of the month next following the date specified in the notice originally issued under section 47 for payment of tax due, shall be deemed to be invalid or ever to have been invalid, and accordingly-

(a) all such interest levied or collected or purporting to have been levied or collected under this Act shall be deemed always to have been validly levied or collected ill accordance with this Act;

(b) no suit or other proceeding shall be maintained or continued in any Court or before any Tribunal or Authority for the refund of, and no enforcement shall be made by any Court, Tribunal or Authority of any decree or order directing the refund of, any such interest which has been collected;

(c) recoveries shall be made in accordance with the provisions of this Act, of all amounts which would have been collected thereunder as interest as aforesaid as if this section had been in force at all material times.