(1) it's a violation of this statute to drive or move or to own & cause or knowingly permit to be driven or moved any motor vehicle or trailer on any highway if the highway is posted showing conditions that require vehicle traction tires or chains & the vehicle is not equipped with vehicle traction tires or chains that are required for the posted conditions

(2) traction tires or chains that are referred to in this section are those established by rule under the authority granted under 815.045 (Rules for use of traction tires, retractable studded tires and chains)

(3) this statute doesn't apply to vehicles exempted from under 815.145 (traction tires or chains - exemptions)

(4) this statute only applies to sections of highway on which a road authority requires the use of traction tires or chains & on which signs requiring the use of traction tires or chains have been posted as provided in 815.045 (Rules for use of traction tires, retractable studded tires and chains)

(5) a court may not find a person to be in violation of the offense described under this statute if the court determines that the conditions of the highway at the time the person was cited did not require posting under rules adopted under 815.045. The defense under this subsection may be affirmatively asserted by any person cited for violation of the offense described in this statute

(6) The offense described in this section, failure to use vehicle traction tires or chains, is a specific fine traffic violation. The presumptive fine for failure to use vehicle traction tires or chains is $880