EQUIVALENCE OF GROUPs IN THE THREE SERVICES OF ARMED FORCES
| Period | Army | |
| Pre-1973 | A | B TO H & Gunner GD |
| 01.01.1973 to 09.10.1997 | A | B TO E |
| 10.10.97 to 31.12.2005 | X | Y,Z |
| 01.01.2006 onwards | X | Y |
| Period | Air Force | |
| Pre-1973 | I | II, III, IV,V |
| 01.01.1973 to 09.10.1997 | I | II, III,IV |
| 10.10.97 to 31.12.2005 | X | Y,Z |
| 01.01.2006 onwards | X | Y |
| Period | Navy | |
| Pre-1996 | A | Other than A ,B,C |
| 01.01.1996 to 9.10.97 | A | Special group ,B,C |
| 10.10.97 to 31.12.2005 | X | Y,Z |
| 01.01.2006 onwards | X | Y |
Note: Group Code 1,2,3,4 shown in the PPO for various periods in r/o naval personnel. Code shown as 1 is for group A/X and rest are in group Y.