A CAIR SO2 opt-in unit must be a unit that:
    
    
        
        (a) 
         Is located in a State that submits, and for which the Administrator approves, a State implementation plan revision in accordance with  § 51.124(r)(1), (2), or (3) of this chapter establishing procedures concerning CAIR opt-in units;
     
    
        
        (b) 
         Is not a CAIR SO2 unit under  § 97.204 and is not covered by a retired unit exemption under  § 97.205 that is in effect;
     
    
        
        (c) 
         Is not covered by a retired unit exemption under  § 72.8 of this chapter that is in effect and is not an opt-in source under  part 74 of this chapter ;
     
    
        
        (d) 
         Has or is required or qualified to have a title V operating permit or other federally enforceable permit; and
     
    
        
        (e) 
         Vents all of its emissions to a stack and can meet the monitoring, recordkeeping, and reporting requirements of subpart HH of this part.