The surface of a table, counter or working surface on which unwrapped food is handled and any equipment, utensil or basin or any other surface which comes into direct contact with food, must be made of smooth, rust-proof, non-toxic and non-absorbent material that is free of open joints or seams but wooden chopping blocks, cutting boards and utensils are not prohibited if such items are kept in such a condition that dirt does not accumulate thereon or therein and are maintained as such.