(b) CONFORMING AMENDMENT.—Paragraph (2) of 
section 9502(e) of such Code is amended by striking 
‘‘April 1, 2010’’ and inserting ‘‘July 4, 2010’’. 
(c) EFFECTIVE DATE.—The amendments made by 
this section shall take effect on April 1, 2010. 
SEC. 4. EXTENSION OF AIRPORT IMPROVEMENT PROGRAM. 
(a) AUTHORIZATION OF APPROPRIATIONS.— 
(1) IN GENERAL.—Section 48103(7) of title 49, 
United States Code, is amended to read as follows: 
‘‘(7) $3,024,657,534 for the period beginning 
on October 1, 2009, and ending on July 3, 2010.’’. 
(2) OBLIGATION
OF
AMOUNTS.—Sums made 
available pursuant to the amendment made by para-
graph (1) may be obligated at any time through 
September 30, 2010, and shall remain available 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 period beginning on October 1, 2009, 
and ending on July 3, 2010, the Administrator of 
the Federal Aviation Administration shall— 
(A) first calculate funding apportionments 
on an annualized basis as if the total amount 
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available under section 48103 of such title for 
fiscal year 2010 were $4,000,000,000; and 
(B) then reduce by 89⁄365— 
(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 ‘‘March 31, 2010,’’ 
and inserting ‘‘July 3, 2010,’’. 
SEC. 5. EXTENSION OF EXPIRING AUTHORITIES. 
(a) Section 40117(l)(7) of title 49, United States 
Code, is amended by striking ‘‘April 1, 2010.’’ and insert-
ing ‘‘July 4, 2010.’’. 
(b) Section 44302(f)(1) of such title is amended— 
(1) by striking ‘‘March 31, 2010,’’ and insert-
ing ‘‘July 3, 2010,’’; and 
(2) by striking ‘‘June 30, 2010,’’ and inserting 
‘‘September 30, 2010,’’. 
(c) Section 44303(b) of such title is amended by 
striking ‘‘June 30, 2010,’’ and inserting ‘‘September 30, 
2010,’’. 
(d) Section 47107(s)(3) of such title is amended by 
striking ‘‘April 1, 2010.’’ and inserting ‘‘July 4, 2010.’’. 
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(e) Section 47115(j) of such title is amended by strik-
ing ‘‘April 1, 2010,’’ and inserting ‘‘July 4, 2010,’’. 
(f) Section 47141(f) of such title is amended by strik-
ing ‘‘March 31, 2010.’’ and inserting ‘‘July 3, 2010.’’. 
(g) Section 49108 of such title is amended by striking 
‘‘March 31, 2010,’’ and inserting ‘‘July 3, 2010,’’. 
(h) Section 161 of the Vision 100—Century of Avia-
tion Reauthorization Act (49 U.S.C. 47109 note) is 
amended by striking ‘‘April 1, 2010,’’ and inserting ‘‘July 
4, 2010,’’. 
(i) Section 186(d) of such Act (117 Stat. 2518) is 
amended by striking ‘‘April 1, 2010,’’ and inserting ‘‘July 
4, 2010,’’. 
(j) The amendments made by this section shall take 
effect on April 1, 2010. 
SEC. 
6. 
FEDERAL 
AVIATION 
ADMINISTRATION 
OPER-
ATIONS. 
Section 106(k)(1)(F) of title 49, United States Code, 
is amended to read as follows: 
‘‘(F) $7,070,158,159 for the period begin-
ning on October 1, 2009, and ending on July 
3, 2010.’’. 
SEC. 7. AIR NAVIGATION FACILITIES AND EQUIPMENT. 
Section 48101(a)(6) of title 49, United States Code, 
is amended to read as follows: 
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‘‘(6) $2,220,252,132 for the period beginning 
on October 1, 2009, and ending on July 3, 2010.’’. 
SEC. 8. RESEARCH, ENGINEERING, AND DEVELOPMENT. 
Section 48102(a)(14) of title 49, United States Code, 
is amended to read as follows: 
‘‘(14) $144,049,315 for the period beginning on 
October 1, 2009, and ending on July 3, 2010.’’. 
SEC. 9. EXTENSION AND FLEXIBILITY FOR CERTAIN ALLO-
CATED 
SURFACE 
TRANSPORTATION 
PRO-
GRAMS. 
(a) SHORT TITLE.—This section may be cited as the 
‘‘Surface Transportation Extension Modification Act of 
2010’’. 
(b) MODIFICATION OF ALLOCATION RULES.—Section 
411(d) of the Surface Transportation Extension Act of 
2010 is amended— 
(1) in paragraph (1)— 
(A) in the matter preceding subparagraph 
(A)— 
(i) by striking ‘‘1301, 1302,’’; and 
(ii) by striking ‘‘1198, 1204,’’; and 
(B) in subparagraph (A)— 
(i) in the matter preceding clause (i) 
by striking ‘‘apportioned under sections 
104(b) and 144 of title 23, United States 
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Code,’’ and inserting ‘‘specified in section 
105(a)(2) of title 23, United States Code 
(except the high priority projects pro-
gram),’’; and 
(ii) in clause (ii) by striking ‘‘appor-
tioned under such sections of such Code’’ 
and inserting ‘‘specified in such section 
105(a)(2) (except the high priority projects 
program)’’; 
(2) in paragraph (2)— 
(A) in the matter preceding subparagraph 
(A)— 
(i) by striking ‘‘1301, 1302,’’; and 
(ii) by striking ‘‘1198, 1204,’’; and 
(B) in subparagraph (A)— 
(i) in the matter preceding clause (i) 
by striking ‘‘apportioned under sections 
104(b) and 144 of title 23, United States 
Code,’’ and inserting ‘‘specified in section 
105(a)(2) of title 23, United States Code 
(except the high priority projects pro-
gram),’’; and 
(ii) in clause (ii) by striking ‘‘appor-
tioned under such sections of such Code’’ 
and inserting ‘‘specified in such section 
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105(a)(2) (except the high priority projects 
program)’’; and 
(3) by adding at the end the following: 
‘‘(5) PROJECTS OF NATIONAL AND REGIONAL 
SIGNIFICANCE
AND
NATIONAL
CORRIDOR
INFRA-
STRUCTURE IMPROVEMENT PROGRAMS.— 
‘‘(A) REDISTRIBUTION AMONG STATES.— 
Notwithstanding sections 1301(m) and 1302(e) 
of SAFETEA–LU (119 Stat. 1202 and 1205), 
the Secretary shall apportion funds authorized 
to be appropriated under subsection (b) for the 
projects of national and regional significance 
program and the national corridor infrastruc-
ture improvement program among all States 
such that each State’s share of the funds so ap-
portioned is equal to the State’s share for fiscal 
year 2009 of funds apportioned or allocated for 
the programs specified in section 105(a)(2) of 
title 23, United States Code. 
‘‘(B) DISTRIBUTION AMONG PROGRAMS.— 
Funds apportioned to a State pursuant to sub-
paragraph (A) shall be— 
‘‘(i) made available to the State for 
the programs specified in section 105(a)(2) 
of title 23, United States Code (except the 
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