The following parties shall be subject to the provisions of this part:
    
    
        
        (a) 
         Owners, operators, and designated representatives of affected sources and affected units pursuant to  § 72.6 of this chapter ;
     
    
        
        (b) 
         Any new independent power producer as defined in  section 416 of the Act and  § 72.2 of this chapter, except as provided in  section 405(g)(6) of the Act;
     
    
        
        (c) 
         Any owner of an affected unit who may apply to receive allowances under the Energy Conservation and Renewable Energy Reserve Program established in accordance with  section 404(f) of the Act;
     
    
        
        (d) 
         Any small diesel refinery as defined in  § 72.2 of this chapter, and
     
    
        
        (e) 
         Any other person, as defined in  § 72.2 of this chapter, who chooses to purchase, hold, or transfer allowances as provided in  section 403(b) of the Act.