Section 21B(3) in The Maharashtra Housing and Area Development (Estate Management, Sale, Transfer and Exchange of Tenements) Regulations, 1981
(3)Until the building is so conveyed to a co-operative society or a company or an Association and the land underneath and appurtenant thereto is leased to it the same shall continue to be a "authority premises" and the provisions of the Act and the Rules and Regulations made thereunder shall Continue to apply in respect of all matters regulated by them.