(a) To act as an authority’s representative, independent of a design-build contractor, for the procurement process and for the duration of the work on a transportation project, an authority shall select or designate:
(1) an engineer;
(2) a qualified firm, selected in accordance with Section 2254.004, Government Code, that is independent of the design-build contractor; or
(3) a general engineering consultant that was previously selected by an authority and is selected or designated in accordance with Section 2254.004, Government Code.
(b) The selected or designated engineer or firm has full responsibility for complying with Chapter 1001, Occupations Code.