Final answer:
TDLR must update the filer and subjects of a complaint regarding the investigation's status, provided it doesn't interfere with an undercover operation. The exact time intervals for these updates can differ, but there is a general expectation of regular communication.
Step-by-step explanation:
The Texas Department of Licensing and Regulation (TDLR) has an obligation to notify the filer and subjects of a complaint about the status of the investigation unless such notice would compromise an undercover operation. While the specific time frame for these notifications can vary based on statute or regulation, it is generally expected that TDLR updates involved parties periodically throughout the investigative process. Compliance with notification requirements ensures transparency and fairness in regulatory enforcement actions and investigations.