(a) Unless prohibited by Chapter 522, and except as provided by Subsection (b), the license holder may operate any vehicle of the type for which that class of license is issued and any lesser type of vehicle other than a motorcycle.
(b) Subsection (a) does not prohibit a license holder from operating a lesser type of vehicle that is:
(1) a motorcycle described by § 521.001(a)(6-a) or an autocycle as defined by § 501.008; or
(2) a type of motorcycle defined by the department under § 521.001(c) and designated by the department as qualifying for operation under this section.