The importation of the following products requires special approval by Saudi authorities: agricultural seeds, live animals, books, periodicals, movies, and tapes; religious books and tapes; chemicals and harmful materials; pharmaceutical products; wireless equipment and radio-controlled model airplanes; horses; products containing alcohol (e.g., perfume); natural asphalt; and archaeological artifacts. Saudi law prohibits importation of the following products: weapons, alcohol, narcotics, pork and pork products, pornographic materials, distillery equipment, retreaded or used tires, used clothing and certain sculptures. Saudi Customs also does not allow importation of cars older than five years, salvaged cars, used police cars, taxies and rental cars. For additional information, please review requirements on the SASO and Saudi Customs web sites. Only Saudi nationals may import goods for resale and conduct direct marketing activities; however, foreign industrial entities may conduct trade in the products they manufacture, and nationals of GCC member states may engage in certain retail and trading activities.