http://www.txstate.edu/about/open_records_act.html
B. Information that may be withheld due to an exception
By the tenth (10th) business day after a governmental body receives your written request, a governmental body must:
1. request an Attorney General opinion and state which exceptions apply;
2. notify the requestor of the referral to the Attorney General; and
3. notify third parties if the request involves their proprietary information.
Failure to request an Attorney General opinion and notify the requestor within 10 business days will result in a presumption that the information is open unless there is a compelling reason to withhold it.
Waco did not comply with the ten day requirement.
The only effect of that is to create a presumption, and I would wager that the presence of a presumption is insignificant in practice. Both the state and the city have the same interest here, and both will assert "compelling reason" to delay making the information public.