A. The D combining district may be utilized on subdivision projects when, because of terrain, site characteristics or overall project design, varying lot sizes or cluster development with mitigating open areas are more desirable than standard, uniform lot sizes.
B. For subdivisions utilizing the D combining district located within the Coastal Zone outside of the urban rural boundary, the resulting lot sizes of the subdivided parcel(s) shall be no smaller than the average size of surrounding parcels, as established under the criteria for Division of Rural Lands within the general plan coastal element use plan.