Tex. Gov't Code § 403.073

A person holding a claim against the state for which a warrant has not been issued and for which the appropriation has been exhausted shall present the claim to the comptroller for the comptroller's consideration not later than 30 days before the meeting of each regular session of the legislature. The comptroller may not audit such a claim presented after this deadline until the comptroller has considered and passed on all claims presented before the deadline.