Currently in operation are four bonded warehouses that are Dryports or inland container depots created under Prakas 1214 of 30 Dec 1999. These are Meng Sreang Inland Port, CWT Dry Port, So Nguon Dry Port and Golden Ocean Dry Port, located within Phnom Penh. These serve Sihanoukville, one of which is operated by the port authority and two privately. These bonded warehouses are used for storing and examining imported goods before they are released from Customs. Bonded warehouses are approved by the Council of Ministers and controlled by Customs under the guidance of the MEF. Their operators are required to conclude agreements with the GDCE and fulfill all technical obligations for operating the warehouse, including a deposit/guarantee to the GDCE in order to secure the payment of duties or other dues that may be claimed by GDCE under the agreement.

Importers may choose where they want goods to be cleared and inform the GDCE . This allows Dryport Stations and the 21 trucking companies to compete, enhancing efficiency and lowering costs. The operator provides handling and transport services, charging fees of US$10-­15 for 20-ft containers and US$25 for 40-ft containers. So Nguon Dryport handles 7 declarations a day. In 2003, 3700 containers of imported cargo and 3801 containers of exported cargo were handled. These made up about 10% of Sihanoukville seaport entries. About 50% of entries underwent pre-shipment inspection.