307.010.  Loads which might become dislodged to be secured — cotton trailers — failure, penalty. — 1.  All motor vehicles, and every trailer and semitrailer operating upon the public highways of this state and carrying goods or material or farm products which may reasonably be expected to become dislodged and fall from the vehicle, trailer or semitrailer as a result of wind pressure or air pressure and/or by the movement of the vehicle, trailer or semitrailer shall have a protective cover or be sufficiently secured so that no portion of such goods or material can become dislodged and fall from the vehicle, trailer or semitrailer while being transported or carried.

  2.  A cotton trailer, as defined in section 301.010, shall not be in violation of this section, provided it is traveling at speeds less than seventy miles per hour from field to field or from field to market and return, and no portion of such goods or material becomes dislodged and falls from the cotton trailer, and the goods are or material is:

  (1)  Immobilized, such so that it cannot shift or tip to the extent that the vehicle's stability or maneuverability is adversely affected;

  (2)  Transported in a sided vehicle that has walls of adequate strength, such that each article of cargo within the vehicle is in contact with, or sufficiently close to a wall or other articles, so that it cannot shift or tip to the extent that the vehicle's stability or maneuverability is adversely affected;

  (3)  Fully contained within the structure of the vehicle, and firmly immobilized or secured on or within the vehicle by structures of adequate strength, dunnage or dunnage bags, shoring bars, tiedowns, or a combination of these; or

  (4)  Otherwise secured in accordance with federal law.

  3.  Operation of a motor vehicle, trailer or semitrailer in violation of this section shall be a class C misdemeanor, and any person convicted thereof shall be punished as provided by law.