,,ii  #aai? ,,congress  #b;d ,session   
,s4 #ecfc  ,,9 ,,! ,,s5ate ,,( ,,!      
,,unit$ ,,/ates  ,augu/ #g1 #bjbf,mr4   
,hu/$ 7= himself & ,ms4 ,lummis7        
introduc$ ! foll[+ bill2 :i* 0 read     
twice & ref]r$ to ! ,committee on       
,environm5t & ,public ,works  ,a ,,bill 
,to am5d sections #aaa1 #afi1 & #aga ( !
 ,clean ,air ,act to cl>ify :5 a        
physical *ange 91 or *ange 9 ! me?od (  
op]ation (1 a /ation>y s\rce con/itutes 
a modification or con/ruction1 & = o!r  
purposes4  #a4 ,%ort title ,?is ,act may
 be cit$ z ! ,new ,s\rce ,review        
,p]mitt+ ,improvem5t ,act4  #b4         
,cl>ification ( def9ition ( a           
modification3 emission rate increases1  
pollution control1 effici5cy1 safety1 & 
reliability projects ,p>agraph 7#d7 (   
section #aaa7;a7 ( ! ,clean ,air ,act   
7#db ,u4,s4,c4 #gdaa7;a77 is am5d$--    
7#a7 by ins]t+ 7,a7 be=e ,! t]m2  7#b7  
by add+ at ! end ! foll[+3 ,= purposes (
 ! prec$+ s5t5ce1 a *ange increases !   
am\nt ( any air pollutant emitt$ by su* 

s\rce only if ! maximum h\rly emission  
rate ( an air pollutant t is a*ievable  
by su* s\rce aft] ! *ange is high] ?an !
 maximum h\rly emission rate ( su* air  
pollutant t 0 a*ievable by su* s\rce    
dur+ any h\r 9 ! #aj-ye> p]iod          
imm$iately prec$+ ! *ange42 &  7#c7 by  
add+ at ! end ! foll[+3  7,b7 ,not)/&+  
subp>agraph 7,a71 ! t]m modification    
does n include a *ange at a /ation>y    
s\rce t is design$-- 7i7 to r$uce !     
am\nt ( any air pollutant emitt$ by !   
s\rce p] unit ( production2 or  7ii7 to 
re/ore1 ma9ta91 or improve ! reliability
 ( op]ations at1 or ! safety (1 ! s\rce1
  except1 ) respect to ei!r clause 7i7  
or 7ii71 :5 ! *ange w\ld be a           
modification z def9$ 9 subp>agraph 7,a7 
& ! ,adm9i/rator det]m9es t ! increase 9
 ! maximum a*ievable h\rly emission rate
 ( a pollutant f su* *ange w\ld cause an
 adv]se effect on human heal? or !      
environm5t4  4  #c4 ,cl>ification (     
def9ition ( con/ruction & applicability 
( precon/ruction requirem5ts = prev5tion

 ( significant det]ioration  7a7        
,applicability to con/ruction activities
 ,section #afe ( ! ,clean ,air ,act 7#db
 ,u4,s4,c4 #gdge7 is am5d$ by add+ at ! 
end ! foll[+3  7f7 ,applicability to    
con/ruction  7#a7 ,9 g5]al ,!           
requirem5ts ( subsection 7a7 t apply )  
respect to au?oriz+ con/ruction ( a     
major emitt+ facility %all apply only ) 
respect to con/ruction t involves       
physical con/ruction ( ! discrete p>ts (
 an emissions unit at a major emitt+    
facility1 reg>dless ( :e!r ! con/ruction
 involves o!r physical on-site          
activities at ! major emitt+ facility1  
includ+ any su* o!r physical on-site    
activity t-- 7,a7 may be co/ly2  7,b7   
may significantly alt] ! site2  7,c7 is 
p]man5t 9 nature2 or  7,d7 is to        
accommodate an in/allation to an        
emissions unit4  7#b7 ,def9ition (      
emissions unit ,9 ?is subsection1 ! t]m 
emissions unit means any "p ( a /ation>y
 s\rce t emits1 or has ! pot5tial to    
emit1 any air pollutant t is regulat$ "u

 ?is title4  4  7b7 ,def9ition ,section 
#afi7b7 ( ! ,clean ,air ,act 7#db       
,u4,s4,c4 #gdgi7b77 is am5d$ by /rik+   
subp>agraph 7,c7 & ins]t+ ! foll[+3     
7,c7 ,! t]m con/ruction1 :5 us$ 9       
connection ) a major emitt+ facility1   
includes a modification 7z def9$ 9      
section #aaa7;a77 at su* facility1      
except t = purposes ( ?is subp>agraph a 
modification does n include a *ange at a
 major emitt+ facility t does n result 9
 a significant emissions increase1 or a 
significant net emissions increase1 9   
annual actual emissions at su* facility4
  4  #d4 ,cl>ification ( def9ition (    
modifications & modifi$ & applicability 
to con/ruction = nonatta9m5t areas  7a7 
,def9ition ,section #aga ( ! ,clean ,air
 ,act 7#db ,u4,s4,c4 #geja7 is am5d$ by 
/rik+ p>agraph 7#d7 & ins]t+ ! foll[+3  
7#d7 ,! t]ms modifications & modifi$    
mean a modification z def9$ 9 section   
#aaa7;a71 except t su* t]ms d n include 
a *ange at a major emitt+ facility t    
does n result 9 a significant emissions 

increase1 or a significant net emissions
 increase1 9 annual actual emissions at 
su* facility4  4  7b7 ,applicability to 
con/ruction ,section #agb7;c77#e7 ( !   
,clean ,air ,act 7#db ,u4,s4,c4         
#gejb7;c77#e77 is am5d$ by add+ at ! end
 ! foll[+3 ,! con/ruction = :i* a p]mit 
is requir$ "u ?is p>agraph is           
con/ruction t involves physical         
con/ruction ( ! discrete p>ts ( an      
emissions unit 7z def9$ 9 section       
#afe7;f77#b77 at a major /ation>y s\rce1
 reg>dless ( :e!r ! con/ruction involves
 o!r physical on-site activities at !   
major /ation>y s\rce1 includ+ any su*   
o!r physical on-site activity t-- 7,a7  
may be co/ly2  7,b7 may significantly   
alt] ! site2  7,c7 is p]man5t 9 nature2 
or  7,d7 is to accommodate an           
in/allation to an emissions unit4  4    
#e4 ,rule ( con/ruction ,no?+ 9 ?is ,act
 or ! am5dm5ts made by ?is ,act %all be 
con/ru$ to treat any *ange z a          
modification = purposes ( any provision 
( ! ,clean ,air ,act 7#db ,u4,s4,c4     

#gdja et seq47 if su* *ange w\ld n h be5
 s treat$ on ! day be=e ! date (        
enactm5t ( ?is ,act4