S&P Global Ratings withdrew its 'AA' rating on Houston combined utility system (CUS), Texas' series 2012B revenue bonds at the city's request. We understand that on the mandatory tender date of June 1, 2017, the city executed a direct purchase arrangement with the State Street Public Lending Corp. in conjunction with the bonds' remarketing. The series 2012B bonds are still considered parity debt under the 2004 CUS master resolution.