The Indian Trade And Nonintercourse Acts
In 1790, Congress enacted the first of a series of Trade and Nonintercourse Acts. The current federal prohibition on the transfer of Indian lands without federal consent has remained virtually unamended through successive reenactment since the Trade and Nonintercourse Act of 1793. The Indian Nonintercourse Act provides:
"No purchase, grant, lease, or other conveyance of lands, or of any title or claim thereto, from any Indian nation or tribe of Indians, shall be of any validity in law or equity, unless the same be made by treaty or convention entered into pursuant to the Constitution."