Final answer:
TCOLE is responsible for setting standards for law enforcement personnel in Texas, including county jailers. The inclusion of county jailers under TCOLE oversight ensures adherence to training and professional standards, although the specific date of inclusion is not given.
Step-by-step explanation:
The Texas Commission on Law Enforcement (TCOLE) is an agency responsible for overseeing various aspects of law enforcement personnel within the state of Texas, including county jailers. TCOLE sets standards for the hiring and training of law enforcement officers, including those working in county jails. The specific date when county jailers were added to TCOLE oversight is not provided in the question, however, TCOLE has had a role in establishing standards for jailers for several years. They provide licensure and ensure that jailers receive proper training and adhere to revised standards that maintain public safety and professional conduct.