All property acquired or held by the authority under this act is declared to be public property used for public and governmental purposes, and all property, income therefrom and bonds issued under this act, interest payable thereon and income derived therefrom, shall at all times be exempt from all taxes imposed by the state, any county, any municipality or any other political subdivision of the state. Upon dissolution of the authority, all assets thereof, after payment of all its indebtedness, shall inure to the benefit of the state.