Pub. L. 93-493, tit. III, sec. 302

Sec. 302. The amount which section 6 of said Act authorizes to be appropriated is hereby further increased by the sum of $6,057,000 (January 1974 prices), plus or minus such amounts, if any, as may be justified by reason of ordinary fluctuations in construction costs as indicated by engineering costs indexes applicable to the type of construction involved herein.