The department shall include, on a rotating basis, at least one question in at least 20 percent of the tests of an applicant’s knowledge and understanding of the provisions of this code, as administered pursuant to Section 12803 or 12814, to verify that the applicant has read and understands that driving with an unsafe, unsecured load, such as driving with ladders, buckets, and loose items in the back of a pickup truck, is a violation of law, including, but not limited to, Sections 23114, 23115, and 24002, and may create a severe traffic safety hazard for other motorists.