Customs officials on Friday reminded Hongkongers travelling abroad to avoid bringing CBD products back into the SAR, even though they might be legal in other countries.
CBD is a chemical derived from cannabis plants, and can be found in the form of food, drinks, health supplements or skincare goods.
The SAR will list CBD as a dangerous drug from February 1 – essentially banning its manufacture, import and export, sale, as well as possession.
Chan Kai-ho, a divisional commander of the customs' airport command, said travellers are responsible for checking whether the products they bring back contain CBD.
"Normally they will have a label describing that they have CBD, if not they will have some symbols, for example the zigzag leaf, and the symbol of hemp. Just take a look at it," he said.
When asked whether there will be a grace period after the law takes effect, Chan said authorities will not tolerate illegal drug trafficking.
He also advised people to dispose of their CBD products in designated boxes inside government buildings by February.