https://www.scconline.com/blog/post/2021/01/22/aft-policy-of-retiring-group-captain-time-scale-at-the-age-of-54-years-instead-of-57-years-creates-a-subclass-within-the-same-class-of-equals-and-is-violative-of-articles-14-and-16-of-the-constitut/