LOP itself is a self-explanatory term that is not associated with any other category of leave. In some companies, during probation, employees are not allowed to take any type of leave, and if he/she has to take a leave, that will be counted as LOP. In this case, no CL, SL, or EL will be counted towards this. For confirmed employees, it becomes the department head's discretion or the attendance system's consideration whether to adjust this LOP against any other category of leave, subject to availability. In the majority of cases, I observed that leaves get adjusted into the available quota, and it fully depends on the understanding between the requisitor and approver. If the requisitor does not have a sufficient balance of leaves, they will fall into LOP.