Trade in goods smuggled into Pakistan once constituted a major source of revenue for Afghanistan. Many of the goods that were smuggled into Pakistan have originally entered Afghanistan from Pakistan, where they fell under the 1965 APTTA. This permitted goods bound for Afghanistan to transit through Pakistani seaports free of duty. Once in Afghanistan, the goods were often immediately smuggled back into Pakistan over the porous border that the two countries share, often with the help of corrupt officials. Additionally, items declared as Afghanistan-bound were often prematurely offloaded from trucks and smuggled into Pakistani markets without paying requisite duty fees. This resulted in the creation of a thriving black market, with much of the illegal trading occurring openly, as was common in Peshawar's bustling Karkhano Market, which was widely regarded as a smuggler's bazaar.