Tex. Transportation Code § 451.454

Sec. 451.454. PERFORMANCE AUDITS: CERTAIN AUTHORITIES. (a) The board of an authority in which the principal municipality has a population of more than 1.9 million or less than 1.3 million shall contract at least once every four years for a performance audit of the authority to be conducted by a firm that has experience in reviewing the performance of transit agencies.

(b) The purposes of the audit are to provide:

(1) evaluative information necessary for the performance of oversight functions by state and local officers; and

(2) information to the authority to assist in making changes for the improvement of the efficiency and effectiveness of authority operations.

(c) Each audit must include an examination of:

(1) one or more of the following:

(A) the administration and management of the authority;

(B) transit operations; or

(C) transit authority system maintenance;

(2) the authority's compliance with applicable state law, including this chapter; and

(3) the following performance indicators:

(A) operating cost per passenger, per revenue mile, and per revenue hour;

(B) sales and use tax receipts per passenger;

(C) fare recovery rate;

(D) average vehicle occupancy;

(E) on-time performance;

(F) number of collisions per 100,000 miles; and

(G) number of miles between mechanical road calls.

(d) A subject described under Subsection (c)(1) must be examined at least once in every third audit.