(a) Except as provided by Subsection (b), the department by rule may use the alternative visual acuity standard prescribed by 49 C.F.R. Section 391.44 if an individual does not meet the visual acuity standard for a commercial driver's license prescribed by 49 C.F.R. Section 391.41 if the person who is applying for a commercial driver's license or who has been issued a commercial driver's license is a person who drives a commercial motor vehicle only in this state.
(b) Subsection (a) does not apply to standards for distant binocular acuity.