(b) Method of billing. All final invoices must include:

1. (1) Department job number;
2. (2) Project location/description;
3. (3) Utility owner work order number;
4. (4) Time period for the work included in the invoice;
5. (5) Name, telephone number, and email address of a contact person;
6. (6) Signature of a utility owner representative and signature date; and
7. (7) As-built plans.

(c) Certification.

1. (1) Final bills for lump-sum agreements shall contain a certification by an appropriate official of the utility owner, i.e., controller, chief financial officer, accounting department manager, facility manager, mayor, county judge, etc., that the relocation work was done in accordance with the provisions of the approved agreement.
2. (2) An acceptable form of certification follows: "This is to certify that the relocation of (include utility owner's name) facilities required under the Lump Sum Agreement dated _______ was completed in accordance with the approved agreement."