On 20 August 2015, a two-judge bench held that composite works contracts could not be taxed as services before 1 June 2007 for want of a charging section and a machinery provision.
On 17 November 1992, a five-judge Constitution Bench fixed the post-46th-Amendment ceiling on State works-contract VAT — value at the time of incorporation, with eight permissible deductions.
On 16 December 1983, a three-judge bench held that HAL's contracts with the Indian Air Force for the servicing and overhauling of aircraft were integral works contracts and not severable into sale-of-goods and labour components, applying the Gannon Dunkerley dominant-nature framework in its last cycle before the 46th Amendment recast the field.
On 26 September 2013, a three-judge bench affirmed K. Raheja and held that pre-completion apartment sales by builders and developers fall within Article 366(29A)(b) as works contracts.
On 1 April 1958, a five-judge Constitution Bench struck down the Madras works-contract sales tax as ultra vires Entry 48 List II — the wall that eventually forced the 46th Constitutional Amendment.