Trade Single Window is a one-stop electronic platform for the trading community to lodge import and export trade documents with the Government. Trade Single Window will provide online application for import licence for radioactive substances and irradiating apparatus soon. Electronic Radiation Licensing and Service System will no longer provide the relevant online application by then. Please visit the Trade Single Window website (https://www.tradesinglewindow.hk) for more information about Trade Single Window and to register as a user. The actual effective date of the aforementioned changeover will be announced in due course. .