 Much of the country's legal imports and exports go through Thilawa Port, the largest and busiest port in Burma.There is also a great deal of informal trade, especially in street markets that exist alongside street platforms of Downtown Yangon's townships.However, on 17 June 2011, the YCDC announced that street vendors, who had previously been allowed to legally open shop at 3  pm, would be prohibited from selling on the streets, and permitted to sell only in their townships of residence, presumably to clean up the city's image.