This law authorizes town planning boards to approve preliminary and final plats of subdivisions showing lots, blocks or sites, with or without streets or highways, within parts of towns that are outside the limits of any incorporated villages. Covered topics include: authorization for review of previously filed plats, filing of certificate, definitions, approval of preliminary plats, approval of final plats, approval and certification of final plats, default approval of preliminary or final plat, filing of decision on final plat, notice to county planning board or agency or regional planning council, filing of final plat; expiration of approval, and subdivision abandonment.