Understanding Leave Policies Under the Gujarat Shops and Establishments Act
In the first place, it would have been better if you mentioned the type of your establishment and the establishment-specific Labor Law covering it. So one is left to make an educated guess that your company must be a shop or establishment covered by the Gujarat Shops and Establishments Act, 1948. As I understand, the Gujarat State Government has very recently passed the GSE Act, 2019 by incorporating the provisions of the Model Shops and Establishments (Regulation of Employment & Conditions of Service) Act, 2016 already introduced by the Government of India. The scales of leave you mentioned seem to be less; better check with the Act.
Leave Entitlements for Different Employee Categories
Secondly, no Indian Labor Law discriminates between permanent/confirmed employees and temporary employees/probationers in respect of service conditions like leave and holidays. Therefore, no employee can be denied their eligible leave during the period of their probation.
Leave Provisions Under the Model S&E Act, 2016
Thirdly, as per the leave provisions of sec. 11 of the Model S&E Act, 2016, apart from the regular weekly holiday of one day, every employee is entitled to 8 days of CL to be credited on a quarterly basis, EL calculated on the basis of one day for every 20 days of service (minimum of 240 days) rendered in the previous calendar year, and 8 paid festival holidays, including Independence Day, Republic Day, and Gandhi Jayanthi.
Calculating Leave on a Pro-rata Basis
Finally, since the above leave is calendar year-based only, I hope that you can arrive at the eligible leave of an employee joining in the middle of the year on a pro-rata basis.