§  543.  Adverse  possession;  how  affected by acts across a boundary  line. 1. Notwithstanding any other  provision  of  this  article,  the  existence  of de minimus non-structural encroachments including, but not  limited  to, fences, hedges, shrubbery, plantings, sheds and  non-structural walls, shall be deemed to be permissive and non-adverse. 2.  Notwithstanding  any  other provision of this article, the acts of  lawn mowing or similar  maintenance  across  the  boundary  line  of  an  adjoining landowner's property shall be  deemed  permissive  and  non-adverse.