Miss. Code Ann. § 63-7-83: Miss. Code Ann. § 63-7-83

Every truck, trailer or other carrier with an open top, while traveling upon any state, United States or interstate highway in the State of Mississippi and while carrying any load of sand, dirt, gravel or rock shall be equipped with a tarpaulin, canvas or other such top and same to be secured over the top of any load of sand, dirt, gravel, or rock.