I agree with the observations of our learned friend Madhu. To my knowledge, hospitals, nursing homes, and similar establishments in the healthcare industry do not have any separate establishment-specific labor laws. As such, they are automatically covered by the respective State's Shops & Establishments Act. However, most of the States' S & E Acts provide explicit exemptions from the provisions pertaining to working hours, leave, etc., in view of the 24/7 operations of hospitals and nursing homes.
At the same time, hospitals and nursing homes fall under the purview of the Minimum Wages Act 1948, and statutory minimum wages are being fixed and enforced. The MW Act has provisions for weekly offs, working hours, payment of overtime for extra work, etc. I am also given to understand that wherever a separate State Law for National and Festival holidays is in force, it will apply to all establishments under the purview of the MWA, 1948 (e.g., Tamil Nadu). Therefore, a hospital is bound to grant National & Festival Holidays to its employees as mentioned by Mr. Madhu.
In this situation, you can take the leave provisions of your State S & E Act as guidelines for leave benefits to your employees and frame a Leave Policy accordingly.