(a) Except as provided by Section 22.003, a witness is entitled to 10 dollars for each day the witness attends court. This fee includes the entitlement for travel and the witness is not entitled to any reimbursement for mileage traveled.
(b) The party who summons the witness shall pay that witness's fee for one day, as provided by this section, at the time the subpoena is served on the witness.
(c) The witness fee must be taxed in the bill of costs as other costs.