In the matter of Union of India (supra) challenge was directed to the Textile Undertakings (Taking Over of Management) Act, 1983. The Court observed, "There is always a presumption that the legislature does not exceed its jurisdiction and the burden of establishing that the legislature has transgressed constitutional mandate, such as those relating to fundamental rights is always on the person who challenges its vires". The Hon‟ble Court further held, "The Court must therefore adjudge the constitutionality of such legislation by the generality of its provisions and not by its crudities or inequities or by the possibilities of abuse of any of its provisions." 

 In the matter of Shiv Kumar Chadha (supra) challenge was against the bar imposed upon the Civil Court to entertain matters under the Delhi Municipal Corporation Act, 1957.