42 U.S.C. § 5515
Use of publicly assisted housing by Secretary in demonstrations
The Secretary shall make appropriate use of publicly assisted housing and particularly low-rent housing assisted under the United States Housing Act of 1937 [ 42 U.S.C. 1437 et seq.] in demonstrating solar heating systems and combined solar heating and cooling systems under this subchapter.
( Pub. L. 93–409, § 17 , Sept. 3, 1974 , 88 Stat. 1078 .)