Hi
As per your company policy it is 12 CL/SL [together] or 1 per month and PL is 15 which comes to 1.25 per month. If an employee joins in Feb he/she will get 11 CL/SL or 5.5 each of it for the year at the time of joining whereas when it comes to PL the same will be credited only after completion of that calendar year. It will not be taken pro-rata at the time of joining but credited at the end of the year with 1.25x11=13.75 leaves for the year of joining. Similarly in the above example of joining in July, the CL/SL will be 6 as there are only 6 months left in the calendar year and the PL will be credited at the end of the calendar year [31 Dec] which will be 1.25 x 6 months = 7.5 leaves. Pro-rata is not applicable for EL/PL.
Hope this is clear.
Thanks and Regards