Hi,
Leave policy can be based on the following contents:
1) Objective
2) Scope - CL,SL, PL
3) Table of entitlement - Type of leave, Quantum of leave, Leave accumulation, eligibilty
4) EL leave bank - pay band wise
5) CL leave bank - pay band wise
6) SL leave bank - pay band wise
7) Maternity leave - 12 weeks

Any other additional features as per your company culture
9) Leave Application form
Regards,
Vaishali