Tenant landlord right. if a person is tenanat for lst 50 yr

Dear Sirs

My mother is tenant at a house since last 50 and baove years in Gujarat. She is alive . She is staying as a tenant of a common property of the society and not of a single owner. So what rights she has to get the property being getting vacted by the Chairman of the society. Can chairmen ask her to vacat the house ? What are her right to this property.

Pls advise