404.1409—Purposes of using compensation.
         Compensation which is treated as wages under  § 404.1408 shall be used, together with wages (see subpart K of this part) and self-employment income  (see subpart K of this part), for purposes of:
    
    
        
        (a) 
         Determining an individual's insured status for monthly benefits or the lump-sum death payment (see subpart B of this part);
    
    
    
        
        (c) 
         Determining an individual's entitlement to the establishment of a period of disability (see subpart B of this part for disability insured status requirements); and