EX-4.RR
        
        
                
                    from S-3
                
                    
                            84 pages                    
            Wells Fargo & Company, [ ], as Unit Agent and as Collateral Agent, and [ ], as Trustee and [ ], as Paying Agent Under the Indenture Referred to Herein, and the Holders From Time to Time of the Units Described Herein Unit Agreement Dated as of **[ , 20 ]
        
        
                12/34/56