423.880—Basis and scope.
        
        (a) 
         Basis. This subpart is based on  section 1860D-22 of the Act, as amended by  section 101 of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA).
    
    
        
        (b) 
         Scope. This section implements the statutory requirement that a subsidy payment be made to sponsors of qualified retiree prescription drug plans.