.Section 106 of the National Historic Preservation Act of 1966 (revised) requires that all Federal agencies, when they fund a project, take into account the effect that the project may have upon any historic resource. A historic resource is defined as a building, structure, object, site or district that is either listed on the National Register of Historic Places, or is eligible to be so listed. This means that any rehabilitation or new construction project which the Community Development Agency subsidizes with funds from the Department of Housing and Urban Development must be reviewed under the Section 106 procedures that have been established by the Federal Advisory Council on Historic Preservation (the Advisory Council). For the National Historic Preservation Act and the Advisory Council's Regulations, please refer to Appendices I and H.

In an effort to expedite this review, the City of St. Louis and its Division of Heritage and Urban Design have negotiated a Programmatic Agreement with the Advisory Council, the Department of Housing and Urban Development (HUD), and the Missouri State Historic Preservation Office (MO-SHPO), to assign HUD's responsibility for Section 106 review to the City. Projects need only be submitted for State and Federal review when agreement cannot be reached between the City and the applicant, or when demolition is contemplated.