...Standard & Poor's Ratings Services assigned its '###' rating to Virginia Public School Authority's series 2015 special obligation school financing bonds supported by Prince William County, Va. and assigned its '###' rating to Prince William County, Va.'s series 2015 general obligation (GO) public improvement bonds. At the same time, we affirmed our '###' rating on the county's outstanding special obligation school bonds and affirmed the existing '###' rating on the county's GO bonds and '##+' rating on the county's existing appropriation backed debt. The outlook is stable. The series 2015 bonds are limited obligations of the authority and secured solely by principal and interest payments on the local school bonds issued by the county and held by the authority. The local school bonds are a general obligation of the county. The authority assigned all of its rights to receive payments on the local school bonds to the state treasurer, who will act as paying agent on the 2015 bonds. The GO bonds...