Legally, possession, manufacturing, trafficking, importation and exportation are forbidden. In 1773, "An act to regulate the importation and exportation of corn" (13 Geo. Customs authorities enforce strict regulations concerning the importation of pornographic items into Saudi Arabia. Punishments for poaching or unlawful importation or sale of these species were also increased. That year Mexico made the importation of slaves illegal. The importation of slaves was made illegal in 1792. In 1807, Congress passed the Act Prohibiting Importation of Slaves, which Jefferson signed. He also prohibited the further importation of sugar from the Caribbean effective in 1813. He also halted Macarthur's allegedly illegal importation of stills. The first crisis was a confrontation over the illegal importation of slaves. The replacement for the importation of slaves from abroad was increased domestic production. In 1924, the United States Congress banned its sale, importation, or manufacture. The Mexican government also forbade the importation of slaves. The ruling outlawed any sales, importation, or advertising of the R4 flashcards. The infection subsequently reached England following the importation of cattle from the continent.