Early departure and CL Avail

Dear All,

Give suggestion how i can configure it:

1) As per Convention and practice no employee can
avail 1/2 (Half) day PL or ML. However in required an employee can avail
1/2 day CL only.

2) Any employee leaving the duty place before completion
of scheduled duty hours, should be treated as "Early Departure"
  and it is applicable to all the plants staff only.Same should be approved thur ESS.

Regards,

Pradip