Some imported goods are duty-free, while certain others are subject to import control upon their arrival in Singapore. Chewing gum which is neither medicated nor approved by the Health Science Authority of Singapore (HSA) is prohibited. Singapore also restricts the entry of tobacco or any tobacco products into the country. Although all food items are allowed to brought into Singapore, food for human consumption from certain countries of origin can be restricted.
These, among other controlled goods, should be declared by an importer at the immigration checkpoint upon arrival in Singapore.