( 1 ) THIS group of appeals filed by the Employees State Insurance Corporation (hereinafter referred to as the Corporation) is directed against a common judgment and order dated 10/12/1982 passed by the Employees Insurance Court Ahmedabad (hereinafter referred to as E. I. Court) dismissing its appeals filed against the decisions of the Medical Appeal Tribunal (hereinafter referred to as the Tribunal) and the only question which is raised in these appeals is whether the E. I. Court was right in holding that the appeals filed by the Respondents in these appeals before the Tribunal were maintainable and that they were not barred by principles of estoppel or waiver.

( 2 ) THE facts in these appeals are common except for the fact that the percentage of permanent disability or the value of permanent disability suffered by each of the respondents varies. The respondent in each appeal (hereinafter referred to as respondent) is an insured person as defined in sec. 2 (14) of the Employees State Insurance Act 1948 (hereinafter referred to as the Act ). The respondent suffered from disablement as a result of employment injury sustained as an employee under the Act. It is not in