The Jakarta administration is imposing stern measures against citizens who litter.

Mudarisin, head of the supervision and regulation division at the Jakarta Environment Agency, said some 35 people were caught littering during car free day (CFD) events along Jl. Sudirman and Jl. M.H. Thamrin over the last two weeks. The CFD is held between 7 a.m. and 10 a.m. every Sunday.

“Most of the visitors who littered were underage. They simply said ‘I forgot’ when asked why they littered,” said Mudarisin.

Citizens who litter will have to pay a Rp 100,000 (US$ 7.50) fine, or pick up trash along the street while wearing a sign saying “I promise to not litter” on their back.