the county commission (in cooperation with its city councils) as the other taxes are. Also, the city of Atlanta imposes an additional 1% municipal-option sales tax (MOST), as allowed by special legislation of the Georgia General Assembly, and last renewed by voters in the February 2016 presidential primaries until 2020. This is for fixing its water and sewerage systems, mainly by separating storm sewers from sanitary sewers. In April 2016, a November referendum for an extra half percent was signed into law for MARTA, but only for the city of Atlanta, after legislators from the wealthy northern suburbs refused to allow the bill to advance unless their districts were excluded. This essentially limits the use of the funds to the Atlanta Beltline through 2057, being the only expansion project needed within the city limits, and blocking an extension of the north (red) line to Roswell and Alpharetta where it is most needed to relieve congestion. As of March 2016, total sales tax rates in Georgia are 3% for groceries and 7% for other items in 107 of its 159 counties. Seven counties charge only 2% local tax (6% total on non-grocery items), and no county charged zero or 1%, but 45 now charge 4% (8% total) due to the TSPLOSTs. Some partially (but none fully) exempt groceries from the local tax by charging 1% less on non-restaurant food than on other items. Fulton and DeKalb (and since 2015, Clayton) counties charge 1% for MARTA, and adjacent metro Atlanta counties may do so by referendum if they so choose. For the portions of Fulton and DeKalb within the city of Atlanta, the total is at 4% and 3% respectively on groceries and 8% on other items due to the MOST, and DeKalb's exemption of groceries from the HOST. Towns and Muscogee counties listed an "other" tax as one of their three 1% taxes. Starting in 2012, regions defined by a new law were each allowed to vote for a TSPLOST sales tax for funding transportation projects, including public transportation and rapid transit (which only play a significant role in metro Atlanta, and are constitutionally blocked from using the state's fuel tax revenues). Most of the regions voted against it, except for the three regions of middle Georgia from Columbus to Augusta. The TSPLOST is not subject to the 3% limit on local taxes, making the local rate in those counties up