Standard&Poor's Ratings Services assigned its 'AAA' long-term rating to Williamson County, Texas' series 2015A limited-tax refunding bonds. At the same time, Standard&Poor's affirmed its 'AAA' long-term rating and underlying rating (SPUR) on the county's general obligation (GO) debt outstanding. The outlook is stable. The bonds are secured by the county's direct and continuing levy of an ad valorem tax on all taxable property within the county. The state of Texas caps this levy at 80 cents per $100 of assessed value (AV), 40 cents of which is permitted to be dedicated for debt service. Currently the county levies a property tax rate of 44.65 cents per $100 of AV, 16.75 cents of which is dedicated for