If retirement age is mentioned in the certified standing orders, that will be final. The employee cannot be retired before that in the absence of any rule to the contrary. If, for any reason, the employee continues in service beyond the retirement age in the standing orders, he should be paid his normal salary and other benefits, including EPF (without pension fund after 58), ESI, etc., until he is retired, and gratuity should be paid until the last day.
Varghese Mathew