The validity of the Amending Act 21 of 1959 was challenged by means of writ petitions before the High Court. A Division Bench struck down the impugned provisions as unconstitutional and ultra vires on the ground that since that Act imposed a restriction on the operators' freedom of trade and commerce under Art. 301 of the Constitution the previous sanction of the President was n.ecessary under the proviso to Art. 304 (b) and because that had not been obtained the Act was legally inoperative : Venson Transport v. The State of Andhra Pradesh('). Subsequently Act 34 of 1961 was enacted after the sanction of the President was obtained to the Bill under the proviso to Art. 304(b). It validated two acts, namely, Act 21 of 1959 and Act 22 of 1959 and also amended Act 16 of 1952 and substituted sub-s. (3) of s. 3 of that Act by a new sub-section. It further validated the realisation of the tax paid or payable and the fee paid or payable and other action taken under Act 21 of 1959 and Act 22 of 1959. It empowered the Government to levy additional tax at the rate of Rs. 50/- per seat per quarter from May 8, 1959 to January 16, 1961. Thereafter from January 17, 1961 to November 3, 1961 the rate was fixed at Rs. 12.50 per seat per quarter. After the commencement of the Validating Act 34 of 1961 the rate was to be Rs. 37.50 per seat per quarter. This 'was to be operative till April 1, 1962 when th~. Act would cease to have any effect.