According to counsel the only question decided in Nakara can be gathered from the following paragraph of the report at page 172: "Do pensioners entitled to receive superannuation or retir ing pension under Central Civil Services (Pension) Rules, 1972 ( ' 1972 Rules ' for short) form a class as a whole? Is the date of retirement a relevant consideration for eligi bility when a revised formula for computation of pension is ushered in and made effective from a specified date? Would differential treatment to pensioners related to the date of retirement qua the revised formula for computation of pen sion attract Article 14 of the Constitution and the element of discrimination liable to be declared unconstitutional as being violative of article 14?" The basic question of law that has to be decided, therefore, is what was the ratio decidendi in Nakara 's case and how far that would 374 be applicable to the case of the P.F. retirees.