(a) A person may not operate a motor vehicle transporting migrant agricultural workers that is loaded or that has a load that is distributed or secured in a manner that prevents the vehicle's safe operation.
(b) A person may not operate a motor vehicle if:
(1) a tailgate, tailboard, tarpaulin, door, fastening device, or equipment or rigging is not securely in place;
(2) an object:
(A) obscures the operator's view in any direction;
(B) interferes with the free movement of the operator's arms or legs;
(C) obstructs the operator's access to emergency accessories; or
(D) obstructs a person's entrance or exit from the cab or operator's compartment; or
(3) property on the vehicle is stowed so that it:
(A) restricts the operator's freedom of motion in properly operating the vehicle;
(B) obstructs a person's exit from the vehicle; or
(C) does not provide adequate protection to passengers and others from injury resulting from a falling or displaced article.
(c) An operator who leaves a motor vehicle unattended shall securely set the parking brake, chock the wheels, and take all reasonable precautions to prevent the vehicle from moving.