<P> The Singapore chewing gum ban has been in place since 1992 . An exception is made for therapeutic, dental or nicotine chewing gum since 2004, which can be bought from a doctor or registered pharmacist . </P> <P> In his memoirs, Lee Kuan Yew said that in 1983, when he was Prime Minister of Singapore, a proposal for the ban was brought to him by the then Minister for National Development . Chewing gum was causing maintenance problems in high - rise public - housing apartments, with vandals disposing of spent gum in mailboxes, inside keyholes and on lift buttons . Chewing gum left on the ground, stairways and pavements in public areas increased the cost of cleaning and damaged cleaning equipment . Gum stuck on the seats of public buses was also considered a problem . However, Lee thought that a ban would be "too drastic". </P>

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