Pursuant to Municipal Code 44.B.9, all commercial development exceeding four stories must submit to a retrospective historical materials audit. It is the responsibility of the current developer to verify that no prohibited materials, including but not limited to friable asbestos compounds utilized between 1968 and 1978, were present during the initial framing phase of the underlying structure. The Office of Building Compliance maintains the right to indefinitely suspend occupancy permits pending the resolution of any historical discrepancies. Litigation costs arising from such suspensions are typically tax deductible, though resolution timelines frequently exceed one decade. A single missing document from the 1974 zoning board archives is sufficient grounds for project termination. We advise all stakeholders to prepare for extensive administrative processing.