(2) by inserting ‘‘or the Airport and Airway Ex-
tension Act of 2010, Part IV’’ before the semicolon 
at the end of subparagraph (A). 
(b) CONFORMING AMENDMENT.—Paragraph (2) of 
section 9502(e) of such Code is amended by striking ‘‘Jan-
uary 1, 2011’’ and inserting ‘‘April 1, 2011’’. 
(c) EFFECTIVE DATE.—The amendments made by 
this section shall take effect on January 1, 2011. 
SEC. 4. EXTENSION OF AIRPORT IMPROVEMENT PROGRAM. 
(a) AUTHORIZATION OF APPROPRIATIONS.— 
(1) IN GENERAL.—Section 48103 of title 49, 
United States Code, is amended— 
(A) by striking ‘‘and’’ at the end of para-
graph (6); 
(B) by striking the period at the end of 
paragraph (7) and inserting ‘‘; and’’; and 
(C) by inserting after paragraph (7) the 
following: 
‘‘(8) $1,850,000,000 for the 6-month period be-
ginning on October 1, 2010.’’. 
(2) OBLIGATION OF AMOUNTS.—Subject to lim-
itations specified in advance in appropriation Acts, 
sums made available pursuant to the amendment 
made by paragraph (1) may be obligated at any time
through September 30, 2011, and shall remain avail-
able until expended. 
(3) PROGRAM
IMPLEMENTATION.—For pur-
poses of calculating funding apportionments and 
meeting other requirements under sections 47114, 
47115, 47116, and 47117 of title 49, United States 
Code, for the 6-month period beginning on October 
1, 2010, the Administrator of the Federal Aviation 
Administration shall— 
(A) first calculate funding apportionments 
on an annualized basis as if the total amount 
available under section 48103 of such title for 
fiscal year 2011 were $3,700,000,000; and 
(B) then reduce by 50 percent— 
(i) all funding apportionments cal-
culated under subparagraph (A); and 
(ii) amounts available pursuant to sec-
tions 47117(b) and 47117(f)(2) of such 
title. 
(b) PROJECT GRANT AUTHORITY.—Section 47104(c) 
of such title is amended by striking ‘‘December 31, 2010,’’ 
and inserting ‘‘March 31, 2011,’’.
SEC. 5. EXTENSION OF EXPIRING AUTHORITIES. 
(a) Section 40117(l)(7) of title 49, United States 
Code, is amended by striking ‘‘January 1, 2011.’’ and in-
serting ‘‘April 1, 2011.’’. 
(b) Section 44302(f)(1) of such title is amended— 
(1) by striking ‘‘December 31, 2010,’’ and in-
serting ‘‘March 31, 2011,’’; and 
(2) by striking ‘‘March 31, 2011,’’ and insert-
ing ‘‘June 30, 2011,’’. 
(c) Section 44303(b) of such title is amended by 
striking ‘‘March 31, 2011,’’ and inserting ‘‘June 30, 
2011,’’. 
(d) Section 47107(s)(3) of such title is amended by 
striking ‘‘January 1, 2011.’’ and inserting ‘‘April 1, 
2011.’’. 
(e) Section 47115(j) of such title is amended by strik-
ing ‘‘January 1, 2011,’’ inserting ‘‘April 1, 2011,’’. 
(f) Section 47141(f) of such title is amended by strik-
ing ‘‘December 31, 2010.’’ and inserting ‘‘March 31, 
2011.’’. 
(g) Section 49108 of such title is amended by striking 
‘‘December 31, 2010,’’ and inserting ‘‘March 31, 2011,’’. 
(h) Section 161 of the Vision 100—Century of Avia-
tion Reauthorization Act (49 U.S.C. 47109 note) is 
amended by striking ‘‘January 1, 2011,’’ and inserting 
‘‘April 1, 2011,’’.
(i) Section 186(d) of such Act (117 Stat. 2518) is 
amended by striking ‘‘January 1, 2011,’’ inserting ‘‘April 
1, 2011,’’. 
(j) The amendments made by this section shall take 
effect on January 1, 2011. 
Passed the House of Representatives December 2, 
2010. 
Attest: 
Clerk.
111TH CONGRESS 
2D SESSION 
H. R. 6473 
AN ACT 
To amend the Internal Revenue Code of 1986 to 
extend the funding and expenditure authority of 
the Airport and Airway Trust Fund, to amend 
title 49, United States Code, to extend the air-
port improvement program, and for other pur-
poses.