(a) A permit is not required to exceed the weight limitations of Section 621.101 by a combination of a tow truck and another vehicle or vehicle combination if:
(1) the nature of the service provided by the tow truck is needed to remove disabled, abandoned, or collision-damaged vehicles; and
(2) the tow truck is towing the other vehicle or vehicle combination directly to the nearest authorized place of repair, terminal, or vehicle storage facility.
(b) This section does not authorize the operation on the national system of interstate and defense highways in this state of vehicles with a weight greater than authorized by federal law.