You're right, John, specifically
</font><font color="blue" class="small">( § 547.401. BRAKES[0] REQUIRED. (a) Except as provided by
Subsection (b), a motor vehicle, trailer, semitrailer, pole
trailer, or combination of those vehicles shall be equipped with
brakes[0] that comply with this chapter.
(b) A trailer, semitrailer, or pole trailer is not required
to have brakes[0] if:
(1) its gross weight is 4,500 pounds or less; or
(2) its gross weight is heavier than 4,500 pounds but
not heavier than 15,000 pounds, and it is drawn at a speed of not
more than 30 miles per hour. )</font>
and
</font><font color="blue" class="small">( (c) A trailer or semitrailer that has a gross weight of
15,000 pounds or less may use surge[0] or inertia brake systems to
satisfy the requirements of Subsection (a). )</font>