All that area bounded by a line commencing at the intersection of the Governor Thomas E. Dewey Thruway and the Greene-Ulster county line; thence northerly along the Governor Thomas E. Dewey Thruway to County Road 47; thence southeasterly along County Road 47 to County Road 30; thence easterly along County Road 30 to the Catskill village line; thence clockwise along the Catskill village line to the west bank of the Hudson River; thence southerly along the Hudson River bank to the Greene-Ulster county line; thence northwesterly along the Greene-Ulster county line to the beginning point; except that area delineated as Level IV.