The government of Balikpapan, East Kalimantan started the ban on plastic bags on July 3rd, 2018 based on the Mayor’s Regulation No. 8 of 2018 regarding Reducing the Use of Plastic Bags. Since the ban has been enforced, there are around 70-80 modern retailers instead in Balikpapan that participated in discarding single-use plastic bags.
As for the traditional market, the ban does not yet come into effect and it serves as a period for further socialization. By July 2019, a report said that the plastic waste in Balikpapan had been reduced by 56 tons per month.
Source: https://waste4change.com/blog/jakartas-ban-on-single-use-plastic-bag/ , https://dietkantongplastik.info/