(a) The Title IV-D agency may pay all fees, expenses, costs, and bills necessary to secure evidence and to take the testimony of a witness, including advance payments or purchases for transportation, lodging, meals, and incidental expenses of custodians of evidence or witnesses whose transportation is necessary and proper for the production of evidence or the taking of testimony in a Title IV-D case.
(b) In making payments under this section, the Title IV-D agency shall present vouchers to the comptroller that have been sworn to by the custodian or witness and approved by the agency. The voucher shall be sufficient to authorize payment without the necessity of a written contract.
(c) The Title IV-D agency may directly pay a commercial transportation company or commercial lodging establishment for the expense of transportation or lodging of a custodian or witness.