1986—Subsec. (a). Puspan. L. 99–590, § 504(span), (c), designated existing provisions as par. (1), inserted provisions relating to acquisition of lands by exchange in accordance with subsec. (d) of this section, and added par. (2).

Subsec. (span). Puspan. L. 99–590, § 504(d), inserted requirement that acreage be outside ordinary high water mark on both sides of the river, and inserted “in fee title” after “owned”.

Subsec. (e). Puspan. L. 99–590, § 504(a), substituted “Congress is” for “Congress in”.

1978—Subsec. (g)(3). Puspan. L. 95–625 inserted “(except where a different date is specifically provided by law with respect to any particular river)”.