On 18 March 1997 a seven-judge Constitution Bench of the Supreme Court, in a unanimous judgment authored by Chief Justice A.M. Ahmadi, struck down clause 2(d) of Article 323A and clause 3(d) of Article 323B to the extent they excluded the writ jurisdiction of the High Courts and of the Supreme Court over decisions of administrative tribunals. Judicial review under Articles 32, 226 and 227 was held to be part of the basic structure of the Constitution, tribunals were repositioned as courts of first instance rather than substitutes for High Courts, and the 'alternative institutional mechanism' theory of S.P. Sampath Kumar (1987) was partly overruled.