1986—Subsec. (c). Pub. L. 99–590 inserted provisions relating to function of appropriate Secretary with respect to acquisition of fee title.

1974—Subsec. (c). Pub. L. 93–279 substituted “within the authorized boundaries of a component of the wild and scenic rivers system, for the purpose of protecting the natural qualities of a designated wild, scenic or recreational river area” for “for the purposes of protecting the scenic view from the river”.