___________________________________________________
| | |
| Service to be credited | Maximum period |
| | for making payments |
|_________________________|_________________________|
| | |
| less than 1 year | 2 years |
| | |
| at least 1 year but | 4 years |
| less than 2 years | |
| | |
| 2 years or more | 5 years |
|_________________________|_________________________|