Following adoption of the Official Map, or part thereof, all
streets, improvements, open space, pathways, greenways, watercourses,
bus shelters or other public grounds and the elements listed in Section
401 of the Pennsylvania Municipalities Planning Code on final, recorded
plats which have been approved as provided by this chapter shall be
deemed amendments to the Official Map. Notwithstanding any of the
other terms of this article, no public hearing need be held or notice
given if the amendment of the Official Map is the result of the addition
of a plat which has been approved as provided by this chapter.