(a) One or more municipalities, one or more counties, a combination of municipalities and counties, or a private group or combination of individuals in this state may pay all or part of the expenses of studying the cost and feasibility and any other expenses relating to:
(1) the preparation and issuance of toll revenue bonds for the construction of a proposed toll project or system;
(2) the improvement, extension, or expansion of an existing project or system; or
(3) the use of private participation under Subchapter E, Chapter 223.
(b) Money spent under Subsection (a) for a proposed toll project or system is reimbursable, with the consent of the commission, to the person paying the expenses out of the proceeds from toll revenue bonds issued for or other proceeds that may be used for the financing, design, development, construction, improvement, extension, expansion, or operation of the project.