JUDGMENT

Bisheshwar Prasad Singh, J.-In this batch of appeals by special leave common questions arise for consideration and therefore the appeals have been heard together and are being disposed of by this common judgment.

2. The questions which arise for consideration are whether sub-section 6 of Section 17 of the Karnataka Sales Tax Act, 1957 (hereinafter referred to as "the Act") as amended by Act No. 5 of 1996 is unconstitutional, and secondly, whether the amendment brought in Clause (i) of sub-section 6 of Section 17 of the Act by Act No. 7 of 1997 retrospectively is also unconstitutional. The High Court of Karnataka has answered both these questions in the negative and against the appellants. The main judgment was rendered in the writ petition preferred by the appellant in Civil Appeal No. 902 of 1999. The remaining matters were disposed of by the High Court following the aforesaid judgment.

3. To determine the questions that arise for consideration, it is necessary to notice the legislative history of sub-section 6 of Section 17 of the Act. We may first notice Section 5B of the Act which provides for levy of tax on transfer of property in goods involved in the execution of works