S&P Global Ratings raised its rating to ?A? from ?A-? on Senatobia Municipal School District , Miss.? series 2016 limited-tax general obligation (GO) notes. At the same time, we assigned our ?A? long-term rating to the Mississippi Development Bank ?s (MDB) proposed $9 million series 2025 special obligation bonds, issued for the district. The raised rating on the outstanding GO notes corrects an error in the application of our criteria. When we adopted our " Issue Credit Ratings Linked To U.S. Public Finance Obligors' Creditworthiness ," criteria (published Nov. 22, 2019,), we maintained the rating one level below the issuer credit rating (ICR), when we should have revised our analysis, as under this criteria, we generally rate limited-tax obligations equivalent