The following words and terms, when used in this subchapter, shall have the following meanings (unless the context clearly indicates otherwise).(1) Visible emissions evaluator--A person trained and certified in Texas to conduct visible emissions assessments as determined by testing every six months consistent with the United States Environmental Protection Agency's guidance found in 40 Code of Federal Regulations Part 60 Appendix A, Method 9.(2) Visible emissions evaluator course--A training course presented by a qualified training provider that has been approved by the executive director.(3) Visible emissions evaluator training provider--A person that has been approved by the executive director to train and certify visible emission evaluators on both the basic lecture session as well as conduct and perform field training.