H. R. 6—487
(II) any such adjustment shall require the 
refiner or importer, to the maximum extent prac-
ticable, to maintain the reduction achieved during 
calendar years 1999 and 2000 in the average 
annual aggregate emissions of toxic air pollutants 
from reformulated gasoline produced or distributed 
by the refiner or importer. 
SEC. 1505. PUBLIC HEALTH AND ENVIRONMENTAL IMPACTS OF FUELS 
AND FUEL ADDITIVES. 
Section 211(b) of the Clean Air Act (42 U.S.C. 7545(b)) is 
amended— 
(1) in paragraph (2)— 
(A) by striking ‘‘may also’’ and inserting ‘‘shall, on 
a regular basis,’’; and 
(B) by striking subparagraph (A) and inserting the 
following: 
‘‘(A) to conduct tests to determine potential public 
health and environmental effects of the fuel or additive 
(including carcinogenic, teratogenic, or mutagenic effects); 
and’’; and 
(2) by adding at the end the following: 
‘‘(4) 
STUDY
ON
CERTAIN
FUEL
ADDITIVES
AND 
BLENDSTOCKS.— 
‘‘(A) IN GENERAL.—Not later than 2 years after the 
date of enactment of this paragraph, the Administrator 
shall— 
‘‘(i) conduct a study on the effects on public health 
(including the effects on children, pregnant women, 
minority or low-income communities, and other sen-
sitive populations), air quality, and water resources 
of increased use of, and the feasibility of using as 
substitutes for methyl tertiary butyl ether in gasoline— 
‘‘(I) ethyl tertiary butyl ether; 
‘‘(II) tertiary amyl methyl ether; 
‘‘(III) di-isopropyl ether; 
‘‘(IV) tertiary butyl alcohol; 
‘‘(V) other ethers and heavy alcohols, as deter-
mined by then Administrator; 
‘‘(VI) ethanol; 
‘‘(VII) iso-octane; and 
‘‘(VIII) alkylates; and 
‘‘(ii) conduct a study on the effects on public health 
(including the effects on children, pregnant women, 
minority or low-income communities, and other sen-
sitive populations), air quality, and water resources 
of the adjustment for ethanol-blended reformulated 
gasoline to the volatile organic compounds performance 
requirements that are applicable under paragraphs (1) 
and (3) of section 211(k); and 
‘‘(iii) submit to the Committee on Environment 
and Public Works of the Senate and the Committee 
on Energy and Commerce of the House of Representa-
tives a report describing the results of the studies 
under clauses (i) and (ii).
H. R. 6—488
‘‘(B) CONTRACTS FOR STUDY.—In carrying out this para-
graph, the Administrator may enter into one or more con-
tracts with nongovernmental entities such as— 
‘‘(i) the national energy laboratories; and 
‘‘(ii) institutions of higher education (as defined 
in section 101 of the Higher Education Act of 1965 
(20 U.S.C. 1001)).’’. 
SEC. 1506. ANALYSES OF MOTOR VEHICLE FUEL CHANGES. 
Section 211 of the Clean Air Act (42 U.S.C. 7545) is amended 
by inserting after subsection (p) the following: 
‘‘(q) ANALYSES OF MOTOR VEHICLE FUEL CHANGES AND EMIS-
SIONS MODEL.— 
‘‘(1) ANTI-BACKSLIDING ANALYSIS.— 
‘‘(A) DRAFT ANALYSIS.—Not later than 4 years after 
the date of enactment of this paragraph, the Administrator 
shall publish for public comment a draft analysis of the 
changes in emissions of air pollutants and air quality due 
to the use of motor vehicle fuel and fuel additives resulting 
from implementation of the amendments made by the 
Energy Policy Act of 2005. 
‘‘(B) FINAL
ANALYSIS.—After providing a reasonable 
opportunity for comment but not later than 5 years after 
the date of enactment of this paragraph, the Administrator 
shall publish the analysis in final form. 
‘‘(2) EMISSIONS MODEL.—For the purposes of this section, 
not later than 4 years after the date of enactment of this 
paragraph, the Administrator shall develop and finalize an 
emissions model that reflects, to the maximum extent prac-
ticable, the effects of gasoline characteristics or components 
on emissions from vehicles in the motor vehicle fleet during 
calendar year 2007. 
‘‘(3) PERMEATION EFFECTS STUDY.— 
‘‘(A) IN
GENERAL.—Not later than 1 year after the 
date of enactment of this paragraph, the Administrator 
shall conduct a study, and report to Congress the results 
of the study, on the effects of ethanol content in gasoline 
on permeation, the process by which fuel molecules migrate 
through the elastomeric materials (rubber and plastic 
parts) that make up the fuel and fuel vapor systems of 
a motor vehicle. 
‘‘(B) EVAPORATIVE EMISSIONS.—The study shall include 
estimates of the increase in total evaporative emissions 
likely to result from the use of gasoline with ethanol con-
tent in a motor vehicle, and the fleet of motor vehicles, 
due to permeation.’’. 
SEC. 1507. ADDITIONAL OPT-IN AREAS UNDER REFORMULATED GASO-
LINE PROGRAM. 
Section 211(k)(6) of the Clean Air Act (42 U.S.C. 7545(k)(6)) 
is amended— 
(1) by striking ‘‘(6) OPT-IN AREAS.—(A) Upon’’ and inserting 
the following: 
‘‘(6) OPT-IN AREAS.— 
‘‘(A) CLASSIFIED AREAS.— 
‘‘(i) IN GENERAL.—Upon’’; 
(2) in subparagraph (B), by striking ‘‘(B) If’’ and inserting 
the following:
H. R. 6—489
‘‘(ii) EFFECT OF INSUFFICIENT DOMESTIC CAPACITY 
TO PRODUCE REFORMULATED GASOLINE.—If’’; 
(3) in subparagraph (A)(ii) (as redesignated by paragraph 
(2))— 
(A) in the first sentence, by striking ‘‘subparagraph 
(A)’’ and inserting ‘‘clause (i)’’; and 
(B) in the second sentence, by striking ‘‘this paragraph’’ 
and inserting ‘‘this subparagraph’’; and 
(4) by adding at the end the following: 
‘‘(B) OZONE TRANSPORT REGION.— 
‘‘(i) APPLICATION OF PROHIBITION.— 
‘‘(I) IN GENERAL.—On application of the Gov-
ernor of a State in the ozone transport region 
established by section 184(a), the Administrator, 
not later than 180 days after the date of receipt 
of the application, shall apply the prohibition speci-
fied in paragraph (5) to any area in the State 
(other than an area classified as a marginal, mod-
erate, serious, or severe ozone nonattainment area 
under subpart 2 of part D of title I) unless the 
Administrator determines under clause (iii) that 
there is insufficient capacity to supply reformu-
lated gasoline. 
‘‘(II) PUBLICATION OF APPLICATION.—As soon 
as practicable after the date of receipt of an 
application under subclause (I), the Administrator 
shall publish the application in the Federal Reg-
ister. 
‘‘(ii) PERIOD OF APPLICABILITY.—Under clause (i), 
the prohibition specified in paragraph (5) shall apply 
in a State— 
‘‘(I) commencing as soon as practicable but 
not later than 2 years after the date of approval 
by the Administrator of the application of the Gov-
ernor of the State; and 
‘‘(II) ending not earlier than 4 years after the 
commencement date determined under subclause 
(I). 
‘‘(iii) EXTENSION OF COMMENCEMENT DATE BASED 
ON INSUFFICIENT CAPACITY.— 
‘‘(I) IN
GENERAL.—If, after receipt of an 
application from a Governor of a State under 
clause (i), the Administrator determines, on the 
Administrator’s own motion or on petition of any 
person, after consultation with the Secretary of 
Energy, that there is insufficient capacity to supply 
reformulated gasoline, the Administrator, by regu-
lation— 
‘‘(aa) shall extend the commencement date 
with respect to the State under clause (ii)(I) 
for not more than 1 year; and 
‘‘(bb) may renew the extension under item 
(aa) for 2 additional periods, each of which 
shall not exceed 1 year.