District of Columbia 256D is a type of bond issued by the District of Columbia government and used to fund public projects and other public services in the district. The bond is backed by the full faith and credit of the District of Columbia, meaning that the district is legally obligated to make timely payments on the bonds. District of Columbia 256D bonds are divided into two types: general obligation (GO) and revenue. General obligation bonds are backed by the taxing power of the district, while revenue bonds are backed by the revenue generated from a specific project or service. The bonds are typically issued in denominations of $5,000 or more and have maximum maturity of 30 years. Interest is paid semi-annually and is typically exempt from federal, state, and local taxes.