(a) The New Castle County Department of Land Use may cooperate with other planning and zoning commissions within New Castle County and within other counties and states, and with the planning, zoning, legislative and administrative authorities of incorporated or unincorporated municipalities, either within or without such County, with a view to coordinating and integrating the zoning of the County with the planning and zoning of other counties or of municipalities.
(b) The Department of Land Use may appoint committees and adopt such rules for the conduct of its business as it deems proper to effect such cooperation or to more expeditiously and effectively perform its functions.