Allow admin to add leave but not employee for certain period of time

Is there a way to restrict employee visibility to an absence type for a set period but Admin should be able to view and add that leave on behalf of employee at any time.

To elaborate, Long Service Leave is an absence type which employees can avail only after completing 7 years of service. So, Long Service Leave should be visible to employees only after they complete 7 years of service but Payroll/Admin should be able to record that leave on behalf of employee at any given time which can be before the 7 year service completion period as well.

Thanks

Gouthami