A. For properties which include area seaward of the historic dune vegetation line as defined herein, the historic dune vegetation line is considered the rear property line for the purposes of calculating lot area, lot coverage, and the pervious area, and for purposes of measuring the rear yard corner triangle.
B. For properties which include area seaward of the erosion control line as defined in Section 161.151 of the State Statutes, the erosion control line is considered the rear property line for the purposes of calculating density.