A 3-judge bench held in October 2019 that the doctrine of mutuality survives Article 366(29A) for incorporated members' clubs — sales tax and service tax both fail, GST left open.
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 12 October 1999, a five-judge Constitution Bench upheld State sales tax on the full price of food and drink served at restaurants and bars under Article 366(29A)(f), with no service-element split.
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.