There is authorized to be appropriated, out of any money in the Treasury not otherwise appropriated, the sum of $65,000, which shall be available until expended for the above purposes: Provided, That at such time as the Smithsonian Institution is satisfied that any State agency, or any educational institution or scientific organization in any of the United States, is prepared to contribute to such investigation and when in its judgment such investigation shall appear meritorious, the Secretary of the Smithsonian Institution may make available for such investigation such amounts from this sum as shall be equal to the amounts contributed respectively by each such State agency, or educational institution or scientific organization: Provided further, That the amount to be made available from this sum for such investigation in cooperation with each such State agency, or educational institution or scientific organization, shall not exceed $10,000 in any fiscal year: Provided further, That all such cooperative work and division of the result thereof shall be under the direction of the Secretary of the Smithsonian Institution: Provided further, That where lands are involved which are controlled by the Government of the United States, cooperative work thereon shall be under the provisions of section 1866(b) of title 18 and sections 320302 and 320303 of title 54, and rules and regulations pertaining thereto.