Gratuity Death Case Calculation

my query is that in case of death of employee the gratuity calculation is:
Basic+DA * Completed year of service * 15/26
But someone told me that there is any supreme/HIgh court judgment, according to which the gratuity is paid on
gratuity will be calculated assuming he would have retired from the service if he was alive. For example in case of an employee joining the firm at the age of 25, dies at the age of 26 and normal retirement age of the firm is 58, then gratuity will be paid to the nominees by considering that he had worked with the firm for 23 years (ie 58-25).
Anybody help me for the same.

I have not come across any such supreme court ruling. I believe there is no ruling as such.
LIC Group Gratuity Scheme provides for insurance coverage to the employees to the tune of future service gratuity.
regards,
Kamal