Dear Mamta,
You can give Medical Leave Extra as well; that is all management's call. Yes, when extra leave is entitled, employees are keen to avail most, if not all of them in a calendar year. Moreover, leave on medical grounds can't be predicted, so you can't require them to inform in advance or seek prior approval.
There could be two scenarios: if you don't want to take on extra financial burden, you can bifurcate the existing 12 leaves into 5 (Casual) and 7 (Medical). However, if you wish to provide separate leave, due to 'timely delivery,' you may not be able to allow or afford all or most of them at a certain point.
You can draft a Holiday, Leave, and Rest (Weekly off) Policy. I would first suggest allowing weekly offs on a rotation basis (for which you need to determine the minimum number of employees required daily, considering their duties for 6 days a week, and calculating the total man-days required, etc.). Once you have the required numbers, you can include the following points in your policy:-
In case any Holiday falls on a Weekly off, no Compensatory Holiday will be allowed.
No Holiday will be allowed between continuous Leaves. The individual must be available either before or after the Holiday; otherwise, the same will be counted as Leave/Absence.
Norms for taking Casual-Sick Leave:
1. Maximum 2 Casual Leaves can be availed in a single instance; beyond 2 regular CLs, PLs, if any, will be adjusted. If no PL is available in balance, the same will be deducted.
2. Maximum 3 Sick Leaves can be availed in a single instance, after which a Medical Certificate must be provided to the HOD.
3. In a single instance, either Casual Leave or Sick Leave can be availed; beyond the maximum limit, PLs, if any, will be adjusted.
4. No Weekly Off-Holiday will be allowed between continuous Leaves. The individual must be available either before or after the Weekly Off-Holiday; else the same will be counted as Leave/Absence.
5. All leaves should be pre-approved by the supervisor/Shift Incharge and finally approved by the HOD.
6. Repetition of Leave around the Holidays and Weekly Offs is allowed only with prior approval from the HOD.
III Weekly Off Policy
Norms for Weekly Off Policy:
1. In general, the Weekly Off is allowed only after performing 6 days of duties.
2. In case any Weekly Off falls on a Holiday, no Compensatory Weekly Off will be allowed.
3. No Weekly Off will be allowed during consecutive Leave/Absence/Holidays.
4. For availing the Weekly Off, the individual must be present either before or after the Weekly Off; otherwise, it will be considered as Absence/PL.
Hope you find the above as per your requirements. You can make modifications as per your management decisions and company policies.