Air Act (42 U.S.C. 7522) is amended by adding at the 
end the following: 
‘‘(c) OLDER VEHICLES.— 
‘‘(1) IN GENERAL.—The aftermarket conversion 
of a vehicle to alternative fuel operation shall not— 
‘‘(A) be considered tampering under this 
section if the aftermarket conversion system 
manufacturer or the person performing the con-
version is able to demonstrate that the develop-
ment and engineering sophistication of the con-
version technology is— 
‘‘(i) matched to an appropriate vehicle 
or group of vehicles; and 
‘‘(ii) well-designed and installed in ac-
cordance with good engineering judgment 
so that the aftermarket conversion system 
does not degrade emission performance, as 
compared to the performance of the vehicle 
or vehicles before the conversion; or 
‘‘(B) require the issuance by the Adminis-
trator of any certificate of conformity. 
‘‘(2) LABEL.—The person performing a conver-
sion described in paragraph (1) shall affix a label to 
the motor vehicle stating that— 
VerDate Sep 11 2014 
05:32 May 02, 2015
Jkt 049200
PO 00000
Frm 00002
Fmt 6652
Sfmt 6201
E:\BILLS\H1944.IH
H1944
emcdonald on DSK67QTVN1PROD with BILLS
‘‘(A) the vehicle has been equipped with an 
aftermarket conversion system; and 
‘‘(B) the installation of that system oc-
curred after the initial sale of the vehicle. 
‘‘(3) NO PRECLUSION OF ORDERS.—Nothing in 
this subsection may be construed to preclude the Ad-
ministrator from issuing an order to prohibit the 
manufacture, sale, distribution, or installation of an 
aftermarket conversion system if the Administrator 
has evidence that the installation of the aftermarket 
conversion system on a vehicle degrades emission 
performance.’’. 
(b) BIOMASS FUELS.—Section 211 of the Clean Air 
Act (42 U.S.C. 7545) is amended by adding at the end 
the following: 
‘‘(w) BIOMASS FUELS.—Notwithstanding any other 
provision of this Act, the Administrator may not prohibit 
or control biomass fuel (as defined in section 203 of the 
Biomass Energy and Alcohol Fuels Act of 1980 (42 
U.S.C. 8802)) under this Act.’’. 
SEC. 3. CALCULATION OF AVERAGE FUEL ECONOMY. 
(a) DEFINITIONS.—Section 32901(a) of title 49, 
United States Code, is amended— 
(1) by redesignating paragraphs (13) through 
(19) as paragraphs (19) through (26); 
VerDate Sep 11 2014 
05:32 May 02, 2015
Jkt 049200
PO 00000
Frm 00003
Fmt 6652
Sfmt 6201
E:\BILLS\H1944.IH
H1944
emcdonald on DSK67QTVN1PROD with BILLS
(2) by redesignating paragraphs (11) and (12) 
as paragraphs (16) and (17), respectively; 
(3) by redesignating paragraph (10) as para-
graph (13); 
(4) by redesignating paragraphs (7), (8), and 
(9) as paragraphs (8), (9), and (10), respectively; 
(5) by inserting after paragraph (6) the fol-
lowing: 
‘‘(7) ‘biodiesel’— 
‘‘(A) means liquid fuel derived from bio-
mass that meets— 
‘‘(i) the registration requirements for 
fuels and fuel additives established by the 
Environmental Protection Agency under 
section 211 of the Clean Air Act (42 
U.S.C. 7545); and 
‘‘(ii) the requirements of the ASTM 
Standard D6751; and 
‘‘(B) does not include any liquid with re-
spect to which a credit may be determined 
under section 40 of the Internal Revenue Code 
of 1986.’’; 
(6) by inserting after paragraph (10), as redes-
ignated, the following: 
‘‘(11) ‘E85’ means a fuel mixture that— 
VerDate Sep 11 2014 
05:32 May 02, 2015
Jkt 049200
PO 00000
Frm 00004
Fmt 6652
Sfmt 6201
E:\BILLS\H1944.IH
H1944
emcdonald on DSK67QTVN1PROD with BILLS
‘‘(A) contains between 51 and 83 percent 
ethanol; and 
‘‘(B) meets the specifications of the ASTM 
Standard D5798. 
‘‘(12) ‘flexible fuel vehicle’ means a vehicle that 
has been warranted to operate on gasoline, E85, and 
M85.’’; 
(7) by inserting after paragraph (13), as redes-
ignated, the following: 
‘‘(14) ‘fuel choice enabling manufacturer’ 
means a manufacturer whose total fleet of auto-
mobiles manufactured for the most recent model 
year for sale in the United States contains at least 
50 percent fuel choice enabling vehicles. 
‘‘(15) ‘fuel choice enabling vehicle’ means an 
automobile that— 
‘‘(A) has been warranted to operate on 
natural gas, hydrogen, propane, or at least 20 
percent biodiesel; 
‘‘(B) is a flexible fuel vehicle; 
‘‘(C) is a plug-in electric drive vehicle; 
‘‘(D) is propelled by a fuel cell that can 
produce power without the use of petroleum or 
a petroleum-based fuel; or 
VerDate Sep 11 2014 
05:32 May 02, 2015
Jkt 049200
PO 00000
Frm 00005
Fmt 6652
Sfmt 6201
E:\BILLS\H1944.IH
H1944
emcdonald on DSK67QTVN1PROD with BILLS
‘‘(E)(i) is propelled by something other 
than an internal combustion engine; and 
‘‘(ii) is warranted to operate on something 
other than petroleum-based fuel.’’; 
(8) by inserting after paragraph (17), as redes-
ignated, the following: 
‘‘(18) ‘M85’ means a fuel mixture that— 
‘‘(A) contains up to 85 percent methanol; 
and 
‘‘(B) meets the specifications of the ASTM 
International Standard D5797.’’; and 
(9) by inserting after paragraph (25), as redes-
ignated, the following: 
‘‘(26) ‘plug-in electric drive vehicle’ has the 
meaning given such term in section 508(a) of the 
Energy Policy Act of 1992 (42 U.S.C. 13258(a)).’’. 
(b) FUEL CHOICE ENABLING MANUFACTURERS.— 
Chapter 329 of title 49, United States Code, is amended— 
(1) in section 32902, by adding at the end the 
following: 
‘‘(l) DEEMED COMPLIANCE WITH THE CLEAN AIR 
ACT.—If a fuel choice enabling manufacturer is in compli-
ance with all applicable standards prescribed under this 
section for model year 2016 or any subsequent model year, 
the automobiles manufactured by such manufacturer in 
VerDate Sep 11 2014 
05:32 May 02, 2015
Jkt 049200
PO 00000
Frm 00006
Fmt 6652
Sfmt 6201
E:\BILLS\H1944.IH
H1944
emcdonald on DSK67QTVN1PROD with BILLS