63 



through 1975, not less than $312,500,000 for fiscal 

 year 1976, including the period July 1, 1976, through 

 September 30, 1976, and not less than $250,000,000 

 per fiscal year for the fiscal years 1977 through 

 1980. 



(d) Research, development, and demonstrations. 



The Secretary is authorized to carry out under 

 section 1353 of this title such demonstration proj- 

 ects as he determines necessary in connection with 

 research and development activities under such 

 section 1353. For research, development, and dem- 

 onstration projects and activities under such sec- 

 tion 1353, there is authorized to be appropriated 

 from the Trust Fund in the amount of $109,350,000 

 for the fiscal year 1976, including the interim 

 period beginning July 1, 1976, and ending Septem- 

 ber 30, 1976, $85,400,000 for the fiscal year 1977, 

 and not less than $50,000,000 per fiscal year for 

 fiscal years 1978 through 1980, to remain available 

 until expended. The initial $50,000,000 of any sums 

 appropriated to the Trust Fund pursuant to sub- 

 section (d) of section 1742 of this title shall be 

 allocated to such research, development, and dem- 

 onstration activities. 



(e) Other expenses. 



The balance of the moneys available in the Air- 

 port and Airways Trust F\ind may be appropriated 

 for (1) costs of services provided under interna- 

 tional agreements relating to the joint financing 

 of air navigation services which are assessed 

 against the United States Government, and (2) di- 

 rect costs incurred by the Secretary to fiight check 

 and maintain air navigation facilities referred to in 

 subsection (c) of this section in a safe and efficient 

 condition. Eligible maintenance expenses are lim- 

 ited to costs incurred in the field and exclude the 

 costs of engineering support and planning, direc- 

 tion, and evaluation activities. The amounts ap- 

 propriated from the Airport and Airway Trust 

 FMnd for the purposes of clauses (1) and (2) may 

 not exceed $250,000,000 for fiscal year 1977, $275,- 

 000,000 for fiscal year 1978, $300,000,000 for fiscal ' 

 year 1979, and $325,000,000 for fiscal year 1980. 

 The amounts appropriated in any fiscal year imder 

 this subsection may not exceed, when added to the 

 minimum amounts authorized for that year under 

 subsections (a), (c), and (d) of this section, the 

 amounts transferred to the Airport and Airway 

 Trust Fund for that year under subsection 208(b) 

 of the Airport and Airway Revenue Act of 1970. No 

 part of the amount appropriated from the Airport 

 and Airway Trust F\ind in any fiscal year for obli- 

 gation or expenditure under clause (2) of this sub- 

 section shall be obligated or expended which ex- 

 ceeds that amount which bears the same ratio to 

 the maximum amount which may be appropriated 

 under clauses (1) and <2) of this subsection for 

 such fiscal year as the total amount obligated in 

 that fiscal year under paragraphs (3) and (4) of 

 subsection (a) of this section bears to the aggregate 

 of the minimum amount made available for obli- 

 gation under each such paragraph for such fiscal 

 year. 



(f) Preservation of funds and priority for airport 

 and airway programs. 



(1) Notwithstanding any other provision of law 

 to the contrary, no amounts may be appropriated 

 from the trust fund to carry out any program or 

 activity under the Federal Aviation Act of 1958, 

 except programs or activities referred to in this 

 section. 



(2) Amounts equal to the minimum amounts 

 authorized for each fiscal year by subsections (a), 

 (c), (d) and the third sentence of subsection (e) 

 of this section shall remain available in the trust 

 fund until appropriated for the purposes described 

 in such subsections. 



(3) No amounts transferred to the trust fund 

 by subsection (bi of section 1742 of this title (relat- 

 ing to aviation user taxes* may be appropriated for 

 any fiscal year to carry out administrative expenses 

 of the Department of Transportation or of any unit 

 thereof except to the extent authorized by subsection 

 (e> of this section. (As amended Pub. L. 92-174, 

 §§ 2, 3, 4(b) , Nov, 27, 1971, 85 Stat. 491, 492; Pub. L. 

 93-44, § 3, June 18, 1973, 87 Stat. 89: Pub. L. 94-353, 

 § 6 and § 201, July 12, 1976, 90 Stat. 872.) 



Amendments 

 1973— Subsec. Ia)(l). Pub. L, 93-44. 5 3(a)(1). In- 

 creased authorization of appropriations for fiscal years 



1974 and 1975 from $250,000,000 to $275,000,000. 

 Subsec. (a)(2) Pub, L. 93-44. 5 3(a)(2). Increased 



authorization of appropriations for fiscal years 1974 and 



1975 from $30,000,000 to $35,000,000. 



Subsec. (b). Pub L. 93-44. § 3(b). substituted $1,460.- 

 000.000" for ■■$840,000,000" in first sentence, substituted 

 'be incurred after' for "extend beyond" in second sen- 

 tence, and limited (in last sentence) liquidation of obli- 

 gations in an aggregate amount not exceeding $1,150,000.- 

 000 prior to June 30. 1974, and $1,460,000,000 prior to 

 June 30. 1975. 



1971 — Subsec. (a) Pub. L. 92-174, §4(b). added refer- 

 ences to American Samoa and the Trust Territory of 

 the Pacific Islands. 



Subsec. Id) Pub. L. 92-174. §2, substituted reference 

 to moneys covering administrative expenses Incident to 

 the administration of programs for which funds are to 

 be allocated as set forth in subsection (c) of this section, 

 for reference to moneys covering the maintenance and 

 operation of air navigation facilities and the conduct of 

 other functions under section 1348(b) of this title not 

 otherwise provided for In subsection (c) of this section. 



Subsec. (e). Pub. L. 92-174, § 3. added subsec. (e). 



§1715. Distribution of funds; .State apportionment. 



(a) Apportionment of funds: discretionary fund ad- 

 dition from unexpended amounts; passengers 

 enplaned. 



( 1 ) As soon as possible after July 1 of each fiscal 

 year for which any amount is authorized to be 

 obligated for the purposes of paragraph (1) of sec- 

 tion 1714ia) of this title, the amount made available 

 for that year shall be apportioned by the Secretary' 

 as follows: 



(A) One-third to be distributed as follows: 



(i) 97 per centum of such one-third for the 

 several States, one-half in the proportion which 

 the population of each State bears to the total 

 population of all the States, and one-half in 

 the proportion which the area of each State 

 bears to the total area of all the States. 



lii) 3 per centum of such one-third for 

 Hawaii, the Commonwealth of Puerto Rico, 



