A driver may not operate a commercial motor vehicle for the following periods:
(a)
Not less than 60 days if that person is convicted of a violation of subdivision (a) of Section 2800, or Section 21462, 22451, or 22452, or subdivision (c) or (d) of Section 22526, involving a commercial motor vehicle and the violation occurred at a railroad-highway crossing.
(b)
Not less than 120 days if that person is convicted of a violation of subdivision (a) of Section 2800, or Section 21462, 22451, or 22452, or subdivision (c) or (d) of Section 22526, involving a commercial motor vehicle, and that violation occurred at a railroad-highway crossing, during
any three-year period of a separate, prior offense of a railroad-highway grade crossing violation, that resulted in a conviction.
(c)
Not less than one year if that person is convicted of a violation of subdivision (a) of Section 2800, or Section 21462, 22451, or 22452, or subdivision (c) or (d) of Section 22526, involving a commercial motor vehicle, and that violation occurred at a railroad-highway crossing, at a railroad-highway grade crossing, during any three-year period of two or more prior offenses of a railroad-highway grade crossing violation, that resulted in convictions.