Dear Prabhat ji, with due respect to you, I would like to differ with you on your statement that no one is eligible for any sort of leave while on probation, training, or internship.
Internship is not employment
As I said in my earlier post, any kind of leave for interns depends entirely on the arrangement between the interns, the college or institute they are attending, and the company.
Regarding probationers or trainees
They are employees of the company and are governed by regulations such as the FA, S&E Act, or service rules and policies formulated by the company in accordance with the law. An employee starts earning privilege leave from day one of employment but is generally allowed to avail it in the following year as per company rules and regulations. Even casual leave is credited to the employee's account from the first day of employment onwards. To my knowledge, no law states that an employee is ineligible for any kind of leave during the probation or trainee period.
Thank you.