while the report may occasionally allude to the interplay between the three economic instruments under review and other pricing mechanisms it does not analyse the other pricing mechanisms listed above they are analysed on the basis of i their capacity to generate the revenues needed to build renew operate and maintain water storage and distribution systems ii their capacity to drive water users behaviour and water demand iii and the institutional arrangements that govern their administration it is levied by provinces and metropolitan cities including seoul and earmarked for river maintenance and repair expenses