JUDGMENT

Arun Kumar, J.-This appeal is directed against the judgment dated 28th February, 1997 passed by a Division Bench of the Gauhati High Court. By the impugned judgment the Division Bench dismissed the appeal against the judgment dated 17th May, 1996 passed by the learned Single Judge. The learned Single Judge had allowed a writ petition filed by respondent herein challenging a notification No. G. 12011/3/87 F.Est dated 3rd Febuary, 1989 whereby certain categories of engineers in the State Engineering Service had been excluded for purposes of revision of pay scales accepted by the State vide Notification No.G. 12011/3/87F.Est dated 19th January, 1989. The Mizoram Engineering Service Association (respondent) has been demanding higher pay scales for its members. The background is that prior to 1971 what is now known as the State of Mizoram was a district called the Lushai Hills District within the State of Assam. From 1971 to 1986 Mizoram was a Union Territory under the North Eastern Areas Reorganisation Act, 1971. It attained full state-hood on 20th February, 1987. In 1974 when the State was a Union Territory, the Government of India constituted a Departmental Pay Committee to s