by the 91st Congress of the United States, Public Law 91-243 — Pub.L. 91−243…
“ AN ACT To amend the Act of October 15, 1966 (80 Stat. 915) , establishing a program for the preservation of additional historic properties throughout the Nation, and for other purposes. Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, Historic properties preservation program, extension. ”
