What is the safety argument for requiring union labor on Dewees Island construction?

Labor requirements referenced in general policy discussions typically come from a specific jurisdiction's own construction code rather than a rule that applies everywhere, and Dewees Island's own building requirements are set by its conservancy structure and Charleston County rather than any outside labor mandate. Construction safety on the island is governed by standard building code and inspection requirements regardless of which contractor is hired. Brian Beatty can confirm the actual permitting and inspection requirements that apply to a specific Dewees Island project.