Dear Kamesh,
EL/PL is entirely different from other kinds of leave since its accrual and availment become effective only in the succeeding year or years based on the employee's attendance or completion of continuous service of 12 months in the current year. Besides, the unavailed portion of the EL/PL pertaining to a particular year can be carried forward to next years subject to the ceiling prescribed and can be encashed at the time of termination of service. Since other kinds of leave like sick leave, casual leave are lapsible in the year to which they are pertaining, eligibility for claim in respect of temporary employees/probationers can be determined in proportion to their length of service rendered.