Maybe it is too late to reply to this thread, and you must have already received your answer. Just for clarification, based on what I have observed in industries:
1. Earned leave is mandatory, but the number of EL days varies from company to company.
2. A company may provide 18 EL days (if we consider the formula of 1 leave day after 20 working days). These working days do NOT include unauthorized absences, leaves without pay, and intervening holidays (e.g., leaves from Friday to Monday will count Saturday-Sunday as leave). However, sanctioned leave is considered a working day.
3. Companies may offer up to 30 EL days, depending on the company's policy.
4. To simplify, understand that if a person has worked from January to December (leave calendar year), they should be given full EL credit to enjoy in the next year.
5. If an employee joins in the middle of the year, their EL can be credited on a pro-rata basis using the formula of 240 working days. This approach will be easier to follow.
Requesting seniors to kindly contribute additional insights to this thread.