Mainland officials are to tighten Customs controls along Chung Ying Street - which straddles the Hong Kong-China border - from tomorrow to crack down on smuggling, especially of parallel imports. Limits will also be imposed on the quantity of goods each visitor or resident is allowed to carry when they enter or leave the street in Shataukok - one side of which lies in Shenzhen and the other in Hong Kong. A mainland Customs source said the aim was to tighten their control over the 200-metre-long street, which is not a formal border checkpoint. 'We conduct checks on people entering or leaving the street at present. But we decided to lay down more concrete rules to form a solid foundation for our law enforcement,' the source said. The street is only open to people with a permit, such as tourists or those who live, study and work there or who want to visit relatives or friends there. Under the new rules, to be implemented from tomorrow, single-visit permit holders will only be allowed to carry goods worth less than a total of 3,000 yuan when they enter or leave the street. They will not be permitted to carry more of any item than that necessary for personal use. People with multiple-visit permits will be allowed to carry daily necessities worth less than 500 yuan when they enter or leave the street. Anyone found to have breached the rules may be asked to pay the amount of tax evaded or face other administrative penalties. Officials imposed the measures to help combat smuggling in the street, especially of parallel imported goods - products distributed to a trading area, such as Hong Kong, by anyone other than the dealer or dealers licensed by the manufacturer. Mainland Customs said an average of 29,000 people entered and left Chung Ying Street every day last year, of whom 18,000 were believed to be smugglers of parallel imported goods. But the mainland Customs source said the daily average this year had dropped to about 15,000, partly because of strengthened efforts to crack down on smugglers. The majority of the smuggled goods seized were mobile phones. The source said the drop was also related to the decline in trade of businesses along the street because of competition from shops in nearby areas. Asked if the mainland would request the SAR to adopt similar control measures, the source said: 'Hong Kong and the mainland have different trade control systems. We've communicated with the SAR government about our new measures.' An SAR Customs and Excise Department spokesman said the department had inspection posts in Chung Ying Street and Shek Chung Au to detect smuggling and other illegal activities. Customs officers seized smuggled goods worth $586,600 in Shataukok in the first half of this year, compared to $485,520 worth of goods seized in the whole of last year.