Payment and Taxes 3.1 The services will be charged to County on a Time and Material basis not including travel or other reimbursable expenses. County agrees to pay Consultant the fees set forth in the SOW. County shall reimburse Consultant for reasonable travel and out-of-pocket expenses incurred in the performance of this Agreement; provided, however, all proposed travel and out-of-pocket expenses must be reviewed and approved by County prior to being incurred. Unless specified otherwise in the SOW, Consultant will invoice County semi-monthly for Services. County’s payment of the Services and Deliverables shall be governed by Chapter 2251 of the Texas Government Code. Invoices shall be paid by County within thirty (30) days from the date of the Williamson County Auditor’s receipt of an invoice. Interest charges for any late payments shall be paid by County in accordance with Texas Government Code Section 2251.025. More specifically, the rate of interest that shall accrue on a late payment is the rate in effect on September 1 of County’s fiscal year in which the payment becomes due. The said rate in effect on September 1 shall be equal to the sum of one percent (1%); and (2) the prime rate published in the Wall Street Journal on the first day of July of the preceding fiscal year that does not fall on a Saturday or Sunday. In the event that a discrepancy arises in relation to an invoice, such as an incorrect amount on an invoice or a lack of documentation that is required to be attached to an invoice to evidence the amount claimed to be due, County shall notify Consultant of the discrepancy. Following County’s notification of any discrepancy as to an invoice, Consultant must resolve the discrepancy and resubmit a corrected or revised invoice, which includes all required support documentation, to the Williamson County Auditor. County shall pay the invoice within thirty (30) days from the date of the Williamson County Auditor’s receipt of the corrected or revised invoice. County’s payment of an invoice that contains a discrepancy shall not be considered late, nor shall any interest begin to accrue until the thirty-first (31st) day following the Williamson County Auditor’s receipt of the corrected or revised invoice. 3.2 County agrees to pay the amount of any sales, value added, use, excise or similar taxes applicable to the performance of the SOW, if any, or County shall provide Consultant with a certificate acceptable to the taxing authorities exempting County from payment of such taxes.