Tenn. Code Ann. § 33-5-507

If, after two (2) years of intensive training on a department-approved competence to stand trial curriculum under § 33-5-501, the defendant has not made substantial progress to attain competence to stand trial, the service provider shall assess the defendant's needs and may terminate the service plan and recommend to the court that the defendant be referred to other mental health or intellectual disability services as deemed appropriate. The service provider shall report its conclusion to the court before terminating services.