Division of land. This bylaw shall apply to the division of land held in single ownership as of October 14, 2010 or anytime thereafter into eight or more lots, whether said eight or more lots are created at one time or are the accumulation of eight or more lots created from said land held in single ownership as of October 14, 2010, and shall require a special permit under Article IV of the Zoning Bylaw and M.G.L. ch. 40A, § 9. A special permit shall be required for "conventional" or "grid" divisions allowed by M.G.L. ch. 41, §§ 81L and 81U, as well as those divisions of land that do not require subdivision approval per M.G.L. ch. 41, § 81P.