50 USC 98h6 - Development of domestic sources

(a) Purchase of materials of domestic origin; processing of materials in domestic facilities 
Subject to subsection (c) of this section and to the extent the President determines such action is required for the national defense, the President shall encourage the development of domestic sources for materials determined pursuant to section 98b (a) of this title to be strategic and critical materials
(1) by purchasing, or making a commitment to purchase, strategic and critical materials of domestic origin when such materials are needed for the stockpile; and
(2) by contracting with domestic facilities, or making a commitment to contract with domestic facilities, for the processing or refining of strategic and critical materials in the stockpile when processing or refining is necessary to convert such materials into a form more suitable for storage and subsequent disposition.
(b) Terms and conditions of contracts and commitments 
A contract or commitment made under subsection (a) of this section may not exceed five years from the date of the contract or commitment. Such purchases and commitments to purchase may be made for such quantities and on such terms and conditions, including advance payments, as the President considers to be necessary.

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(c) Proposed transactions included in annual materials plan; availability of funds 

(1) Descriptions of proposed transactions under subsection (a) of this section shall be included in the appropriate annual materials plan submitted to Congress under section 98h–2 (b) of this title. Changes to any such transaction, or the addition of a transaction not included in such plan, shall be made in the manner provided by section 98d (a)(2) of this title.
(2) The authority of the President to enter into obligations under this section is effective for any fiscal year only to the extent that funds in the National Defense Stockpile Transaction Fund are adequate to meet such obligations. Payments required to be as a result of obligations incurred under this section shall be made from amounts in the fund.
(d) Transportation and incidental expenses 
The authority of the President under subsection (a) of this section includes the authority to pay
(1) the expenses of transporting materials; and
(2) other incidental expenses related to carrying out such subsection.
(e) Reports 
The President shall include in the reports required under section 98h–2 (a) of this title information with respect to activities conducted under this section.