Section 801.500 - "Special use trailer."(1) "Special use trailer" means a trailer described under any of the following: (a) A trailer that is eight and one-half feet or less in width and of any length and that is used for commercial or business purposes.(b) A trailer that is used temporarily on a construction site for office purposes only.(c) A mobile modular unit.(2) "Special use trailer" does not include any travel trailer. 1985 c.16 §26; 1993 c.696 §7; 2003 c. 655, § 90a