Site development plan approval. Proposed development of a tract of land in a Waterfront Development District shall be subject to preliminary and final site development plan approvals by the Planning Board, in accordance with the procedures set forth in Article XI of this chapter, and such regulations as the Village has adopted, or may in the future adopt, under such article. Notwithstanding the above, the Planning Board may employ a single-phase site development plan review and approval process where, in the Planning Board's judgment, said single-phase process will be equally protective of the public health, safety and general welfare and will serve equally to implement the purposes enumerated in §§ 230-2 and 230-22A of this chapter. Any changes in the uses, layout, buildings, structures or other aspects of the development shall require a site development plan amendment and corresponding Planning Board review and approval in conformity with the procedures set forth in Article XI and any regulations thereunder.