Miss. Code Ann. § 55-13-13

Whenever the Governor of the State of Mississippi and the Highway Commission shall deem it to the best interest of the State of Mississippi to proceed to purchase additional right-of-way for the Natchez Trace Parkway so that such rights of way may be available for any contemplated or proposed appropriation to be made by the United States government looking toward the completion of such Natchez Trace Parkway, then the Mississippi Highway Commission is authorized, directed and empowered to proceed to purchase such additional rights-of-way as the said Mississippi Highway Commission and the governor of the State of Mississippi may deem necessary. That the cost of such right-of-way for Natchez Trace Parkway, including the making of surveys and the preparation of plans and specifications and eminent domain proceedings and other necessary expenses shall be paid out of the proceeds of the funds made available for road construction under Laws, 1946, ch. 186, or out of funds made available to the state highway department out of the gasoline tax or out of any other funds made available for use by the State Highway Department, whether the same be for construction or maintenance or for any other purpose.