liest practicable date by which compliance 
is technically feasible. 
‘‘(4) 
ALTERNATIVE
COMPLIANCE
MECHA-
NISM.—The Administrator may provide for an alter-
native mechanism of compliance under this sub-
section for a marine vessel if the Administrator de-
termines that— 
‘‘(A) the vessel employs a control tech-
nology that reduces emissions from the vessel of 
sulfur oxides and particulate matter to at least 
the same degree as the reduction that would be 
achieved by the vessel through compliance with 
the applicable fuel sulfur content limitation 
under this subsection; and 
‘‘(B) the emission reductions achieved as 
described in subparagraph (A) are in addition 
to any reductions required to achieve compli-
ance with an applicable engine emission stand-
ard issued by the Administrator or the head of 
another Federal agency. 
‘‘(5) NO
EFFECT
ON
OTHER
AUTHORITY.— 
Nothing in this subsection limits or otherwise affects 
any authority of the Administrator to regulate fuels 
or fuel additives for use in marine vessels or any 
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other nonroad vehicle or engine under this Act or 
any other provision of law.’’. 
SEC. 4. ADVANCED MARINE VESSEL EMISSION CONTROLS. 
Section 213 of the Clean Air Act (42 U.S.C. 7547) 
is amended— 
(1) by redesignating subsection (d) as sub-
section (f); and 
(2) by inserting after subsection (c) the fol-
lowing: 
‘‘(d) ADVANCED MARINE VESSEL EMISSION CON-
TROLS.— 
‘‘(1) STANDARDS FOR OCEANGOING VESSELS.— 
‘‘(A) IN
GENERAL.—Not later than De-
cember 15, 2008, the Administrator shall pro-
mulgate, and from time to time revise, regula-
tions that establish standards for emissions of 
oxides of nitrogen, particulate matter, hydro-
carbons, and carbon monoxide from newly-man-
ufactured and in-use main and auxiliary en-
gines in oceangoing marine vessels that enter or 
leave a port or offshore terminal of the United 
States. 
‘‘(B) 
REQUIREMENT.—The 
standards 
under subparagraph (A) shall require, effective 
beginning on January 1, 2012, that the engines 
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described in that subparagraph achieve the 
greatest degree of emission reduction achievable 
through the application of technology that the 
Administrator determines, in accordance with 
this paragraph, will be available for the affected 
engines. 
‘‘(C) ADDITIONAL FACTORS FOR CONSID-
ERATION.— 
‘‘(i) IN GENERAL.—In promulgating a 
standard under this paragraph, the Admin-
istrator shall take into consideration— 
‘‘(I) whether the engine is newly- 
manufactured or in-use (and, if the 
engine is in-use, the age of the en-
gine); 
‘‘(II) the cost of applying an 
emission reduction technology in a pe-
riod of time sufficient to achieve com-
pliance with the standard; 
‘‘(III) noise, energy, and safety 
factors associated with the application 
of the technology; and 
‘‘(IV) the feasibility, benefits, 
and costs of requiring— 
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