One of my friends joined a Central Public Sector Understanding (PSU) in the 2010. During his joining time he submitted his Matriculation Certificate as his age proof where his date of birth was mentioned as 08.06.1982. Later he found that his date of birth in his Birth Certificate obtained from Govt Hospital was 08.09.1983. As per certified standing order of the PSU an employee can submit either Matriculation Certificate or Birth Certificate as proof of his age. If my friend would submit the Birth Certificate as age proof he could do more years of service in the PSU as he could retire latter.
My question is whether my friend can apply now to the PSU to change his date of birth on the basis of Birth Certificate obtained from Govt. Hospital. If yes, how?