42 U.S. Code § 1962d–20 - Prohibition on Great Lakes diversions
As used in this section, the term “Great Lakes State” means each of the States of Illinois, Indiana, Michigan, Minnesota, Ohio, Pennsylvania, New York, and Wisconsin.
No water shall be diverted or exported from any portion of the Great Lakes within the United States, or from any tributary within the United States of any of the Great Lakes, for use outside the Great Lakes basin unless such diversion or export is approved by the Governor of each of the Great Lake  States.
No Federal agency may undertake any study, or expend any Federal funds to contract for any study, of the feasibility of diverting water from any portion of the Great Lakes within the United States, or from any tributary within the United States of any of the Great Lakes, for use outside the Great Lakes basin, unless such study or expenditure is approved by the Governor of each of the Great Lakes States. The prohibition of the preceding sentence shall not apply to any study or data collection effort performed by the Corps of Engineers or other Federal agency under the direction of the International Joint Commission in accordance with the Boundary Waters Treaty of 1909.
This section shall not apply to any diversion of water from any of the Great Lakes which is authorized on November 17, 1986.
 So in original. Probably should be “Lakes”.
Section was enacted as part of the Water Resources Development Act of 1986, and not as part of the Water Resources Planning Act which comprises this chapter.
2000—Subsec. (b)(2) to (4). Pub. L. 106–541, § 504(a), added par. (2) and redesignated former pars. (2) and (3) as (3) and (4), respectively.
Subsec. (d). Pub. L. 106–541, § 504(b), inserted “or exported” after “diverted” and “or export” after “diversion”.
Pub. L. 100–4, title V, § 521, Feb. 4, 1987, 101 Stat. 88, provided that in recognition of the serious impacts on the Great Lakes environment that could occur as a result of increased consumption of Great Lakes water, including loss of wetlands and reduction of fish spawning and habitat areas, as well as serious economic losses to vital Great Lakes industries, the Secretary of the Army in cooperation with the Administrator, other interested departments, agencies, and instrumentalities of the United States, and the eight Great Lakes States, was authorized to conduct a study of the effects of Great Lakes water consumption on economic growth and environmental quality in the Great Lakes region and of control measures that could be implemented to reduce the quantity of water consumed, and further provided an appropriation of $750,000 for fiscal years beginning after Sept. 30, 1986, to carry out such study.
Pub. L. 99–662, title XI, § 1142, Nov. 17, 1986, 100 Stat. 4253, as amended by Pub. L. 106–53, title V, § 508, Aug. 17, 1999, 113 Stat. 339; Pub. L. 106–541, title V, § 518, Dec. 11, 2000, 114 Stat. 2653, provided that: