'96 ' the Madras Sales of Motor Spirit Taxation Act, No. VI M.A. Rahman of 1939 was applied to Andhra Pradesh with some v. modifications and the Regulation was repealed. This The State of Act, like the Regulation, had provisions for registra- Andhra Pradesh tion of dealers and in consequence fresh registration certificates were issued to the petitioners as well as to Wanchoo J. all other dealers in the State. In August 1958 the petitions challenging the validity of the Regulation were dismissed. In September 1958 notices were issued to the petitioners informing them that they had failed to submit returns showing sales of motor spirit from March 1957 to March 1958 and they were required to submit returns within seven days, failing which best judgment assessments would be made under the relevant provision of the Regulation. The petitioners maderepresentations against this order and their main case ·was that they had not collected any tax from consumers during this period and it would therefore be harsh to demand tax from them in the circumstances. Thereupon it is said that best judgment assessments were made against the petitioners and they were required to pay the tax, though liberty to pay in instalments wa~ granted to them for this purpose. As however~ l;ie petitioners failed to deposit the tax even in instalments, the. registration certificate of . one of the petitioners was cancelled and other petitioners were threatened with cancellation of .. their registration certificates about October 1959: · Consequently, the present petitions were filed soon after challenging the provisions of the Act relating to cancellation .of regis: tration certificates on the ground that such. canclla_ tion was not a reasonable restriction on the fundamental rights of the petitioners to carry . on business under Art. 19 (1) (g) of the Constitution. The petitioners therefore pray for a declaratioif that sub-ss. (1) and (6) of s. 4 of the Act aud, t. 14 purported to be framed thereunder are ultra vires as being violative. of Art. 19 (1) (g) of the Constitution and for consequen_tial orders against the respondents, namely, the Sta~!l of Andhra Pradesh and its officers, from enforcing ~he said provisions. ' . . . · The petitions have been opposed by the respondents