Kul kayda 32 g querry

We have a 7/12 in Raigad Dist. on main part of 7/12 appears list of our names (my mother and myself and sisters, after death of my father ) On right hand side appears name of "Kul" ( tenant) as protected tenanat ( sanraksh*t kul) Now the original tenant expired and his successors have applied before Tahsildar for registering their names on 7/12 as legal heirs and also have applied for 32G. During last 50 years they have not given us any returns or 'Khand'. Now my querry is can successors be registered as legal heirs and can they get 32G permission? What shoud be our stand? Please guide. Thanks & regards - Mahesh Joshi