Normally Cooperative Societies will be governed by service rules attached to the State rules. As such, there cannot be different retirement ages for different persons though there can be different conditions of service including retirement ages for different classes/ categories of employees, like, workers, class III employees or Officers of Junior executives, Managers and above etc. If the Cooperative Act and Rules framed therein provides for a common retirement age, that should be applicable to all employees. But the Board of Directors may have powers to extend the retirement age of ceratin persons or keep employees even after superannuation on a separate terms. This will be done after the benefits on retirement are settled. Please check.