▁a ▁portion ▁of ▁the ▁property ▁tax ▁( amount ing ▁to ▁US $ 0 . 5 ▁million ) ▁to ▁ON AS , ▁through ▁the ▁equipment ▁fund ▁for ▁municipal ities , ▁to ▁fin ance ▁operation ▁and ▁maintenance ▁of ▁d rain age ▁facilities . ▁However , ▁at ▁least ▁until ▁ 2 0 0 1 , ▁these ▁resources ▁were ▁not ▁made ▁available ▁to ▁ON AS . ▁ ▁Collection ▁efficiency ▁in ▁urban ▁areas ▁Tar iff ▁collection ▁by ▁S DE ▁reached ▁a ▁rate ▁of ▁ 9 8 ▁percent , ▁up ▁from ▁less ▁than ▁ 8 0 ▁percent ▁before ▁the ▁project ▁according ▁to ▁one ▁World ▁Bank ▁source . ▁According ▁to ▁S DE ▁and ▁another ▁World ▁Bank ▁source ▁the ▁tar iff ▁collection ▁rate ▁indeed ▁aver aged ▁ 9 8 % ▁in ▁ 2 0 0 1 - 2 0 0 6 , ▁but ▁it ▁was ▁only ▁slightly ▁lower ▁at ▁ 9 6 % ▁in ▁ 1 9 9 6 . ▁According ▁to ▁again ▁another ▁source ▁the ▁collection ▁ratio ▁in ▁ 1 9 9 6 ▁was ▁ 9 1 %. ▁The ▁le ase ▁contract ▁was ▁signed ▁in ▁April ▁ 1 9 9 6 . ▁ ▁Tar iffs ▁and ▁finan cing ▁policy ▁in ▁rural ▁areas ▁In ▁rural ▁areas ▁benef ici ary ▁communities ▁contribute ▁ 2 0 % ▁to ▁initial ▁invest ments ▁and ▁ 8 0 % ▁is ▁fin anced ▁by ▁the ▁government . ▁Operation , ▁maintenance ▁and ▁replacement ▁costs ▁are ▁to ▁be ▁recovered ▁through ▁tar iff ▁reven ues . ▁ ▁In vest ments ▁and ▁finan cing ▁▁ ▁In vest ment ▁According ▁to ▁the