6. Section 189 of the Principal Act is amended by inserting after subsection (1) the following subsection:
“(1A) Subsection (1) does not apply to a person who drives a motor vehicle upon a public street with more than 1 trailer attached to it where the motor vehicle is being so driven in accordance with a permit granted under section 27 of the Motor Vehicles (Dimensions and Mass) Act 1990 .”.