(a) The consular fees prescribed under section 1201 of Title 22, for official services in connection with the taking of testimony under sections 3492–3494 of this title, and the fees of any witness whose testimony is taken shall be paid by the party who applied for the commission pursuant to which such testimony was taken. Every witness under section 3493 of this title shall be entitled to receive, for each days attendance, fees prescribed under section 3496 of this title. Every foreign counsel selected pursuant to a commission issued on application of the United States, and every interpreter whose services are required by a consular officer under section 3493 of this title, shall be paid by the United States, such compensation, together with such personal and incidental expense upon verified statements filed with the consular officer, as he may allow. Compensation and expenses of foreign counsel selected pursuant to a commission issued on application of any party other than the United States shall be paid by the party whom such counsel represents and shall be allowed in the same manner.

(b) Whenever any party makes affidavit, prior to the issuance of a commission for the purpose of taking testimony, that he is not possessed of sufficient means and is actually unable to pay any fees and costs incurred under this section, such fees and costs shall, upon order of the court, be paid in the same manner as fees and costs are paid which are chargeable to the United States.

(c) Any appropriation available for the payment of fees and costs in the case of witnesses subpenaed in behalf of the United States in criminal cases shall be available for any fees or costs which the United States is required to pay under this section.