It shall be unlaw­ful for any per­son to paste, post, paint, print or nail any hand­bill, sign, poster, adver­tise­ment, or notice of any kind on any curb­stone, flag­stone, or any oth­er por­tion or part of any side­walk, or upon any tree, lamp­post, util­i­ty pole, hydrant, or upon any pri­vate wall, door, or gate with­out the con­sent, in writ­ing, of the own­er of the wall, door or gate; pro­vid­ed, how­ev­er, that this Sec­tion shall not pre­vent post­ing by prop­er Coun­ty and Coun­ty offi­cials of elec­tion signs, polling place signs and oth­er signs or plac­ards nec­es­sary under the law to the con­duct of elec­tions, except they may not be attached to a tree.