1. Where animals are transported in a means of transport without first having been placed in a container, all feedingstuffs to which animals have had access, excreta, bedding, other material of animal origin, mud and other contaminants shall be removed from the means of transport using any appropriate means. All internal surfaces of the vehicle (other than the cab) and, if they are visibly contaminated, the external surfaces and the wheels of the means of transport shall be washed with water, steam or where appropriate chemicals or chemical compounds so that they are free of contamination which could spread disease.