it is illegal to sell or own chewing gum In Singapore.

The chewing gum ban in Singapore was passed within 1992 and revised in 2004 and 2010. It bans the import and sale of chewing gum in Singapore.

The chew gum was ban because people disposed of gum incorrectly by sticking it under places like chairs or tables. 

Chewing gum is banned in Singapore under the "Regulation of Imports and Exports (Chewing Gum) Regulations." Except for chewing gum of therapeutic value, the "importing" of chewing gum into Singapore is banned. Gum can be bought from a doctor, but must be prescribed.

A common misconception among citizens is that personal use of chewing gum is allowed into Singapore. However, according to the set of Regulations, "importing" means to "bring or cause to be brought into Singapore by land, water or air from any place which is outside Singapore ..." any goods, even if they are not for purposes of trade. The set of Regulations also does not make any provisions for personal use of quantities to be brought into Singapore. Therefore, bringing chewing gum into Singapore, even small quantities for whatever purpose, is prohibited.

It seems like a basic right to make such a non-consequential decision, whether or not to chew gum. But the city state has made this decision for everyone there. In America, the ACLU would have filed a lawsuit so fast against the ban that by the time I had my gum wrapper off, the law would be repealed.

Nonetheless, Singapore has had this anti-gum-chewing law on the books since 1992 and it is enforced. In fact, the ban includes imports or sales of chewing gum. In addition, police spies roam the crowd of 4 million in the city to find offenders who chew gum or litter. Residents and citizens say that it is just something that they're use to and if you're doing the right thing there's no problem.