If the special commissioners or a court awards costs against a railroad under Section 21.047, Property Code, because the award of damages to the railroad is equal to or less than the amount the utility, common carrier, cable operator, or energy transporter exercising the right of eminent domain under this subchapter offered to pay, the costs awarded against the railroad must be paid by the railroad without reimbursement by or contribution from any agent or representative, including an agent or representative that handled or assisted in the condemnation proceedings.