Ancestors Property

My Grandfather was Liscensee of a Shop in BMC, after his death in 2003, it was decided by family members (wife, 5 sons and 6 daughters) that the Liscense of the Shop to be transferred in name of my grandmother (wife of deceased), after completing all the formalities of transfer ( NOCs) of legal heirs of deceased was Submitted in BMC in December 2003, but the BMC doesn't transfer the Liscense in name of my grandmother even after giving several letters to the concerned authorities, when we talked to them, they told us transfer is not initiated due to technical reasons. Than in 2007, to avoid technical reasons, it was decided to get the Liscense transfered in the Eldest son of my Grandfather, than again all the formalities and Pappers including NOCs were submitted to the BMC. Currently he transferred the Liscense of the said shop in name of his son in 2017 without informing us. Please note- My grandfather got the Liscense from his father (virasat, it was not his self acquired property) My grandfather died without any will As per BMC rules, we were told that Liscense can be transferred only in one person name. Questions What is the right of other legal heirs in the property? Did they loose their rights by giving NOC? How do other legal heirs get their shares? The family is a muslim family, how are they governed, by Shairat Law or Indian Succession Act?