In DART v. Amalgamated Transit Union, 273 S.W.3d 659, 660 (Tex. 2008), DART and its employees' union operated under a 13(c) arrangement. Id.
The court, in holding 13(c) did not preempt DART's immunity from suit under state law, noted that Texas law prohibits a state political subdivision from collective bargaining with public employees. Id. at 661 (citing Tex. Gov't Code Ann. § 617.002(a), (b) (West 2012)).
The union in DART did not challenge the applicability of section 617.002. Id.
Thus, DART stands for the proposition that a 13(c) arrangement does not preempt the applicability of section 617.002. See id. at 660-61.